TI TPS650240RHBT

TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
Power Management ICs for Li-Ion Powered Systems
FEATURES
1
•
•
•
•
•
•
•
•
•
•
•
1.6A, 1.0A or 0.8A, 97% Efficient Step-Down
Converter for System Voltage (VDCDC1)
– 3.3V or 2.80V or Adjustable
1.6A, 1.0A or 0.8A, up to 95% Efficient
Step-Down Converter for Memory Voltage
(VDCDC2)
– 1.8V or 2.5V or Adjustable
0.8A, 90% Efficient Step-Down Converter for
Processor Core (VDCDC3)
Two Selectable Voltages for VDCDC3
– TPS650240:
– DEFDCDC3= LOW: VO = 1.0V
– DEFDCDC3= HIGH: VO = 1.3V
– TPS650241:
– DEFDCDC3= LOW: VO = 0.9V
– DEFDCDC3= HIGH: VO= 1.375V
– TPS650242:
– DEFDCDC3= LOW: VO = 1.0V
– DEFDCDC3= HIGH: VO = 1.5V
– TPS650243:
– DEFDCDC3= LOW: VO = 1.0V
– DEFDCDC3= HIGH: VO = 1.2V
– TPS650244:
– DEFDCDC3= LOW: VO = 1.55V
– DEFDCDC3= HIGH: VO = 1.6V
– TPS650245:
– DEFDCDC3= LOW: VO = 0.9V
– DEFDCDC3= HIGH: VO = 1.1V
30mA LDO for Vdd_alive
2 × 200mA General Purpose LDOs (LDO1 and
LDO2)
Dynamic Voltage Management for Processor
Core
LDO1 and LDO2 Voltage Externally Adjustable
Separate Enable Pins for Inductive Converters
2.25MHz Switching Frequency
85µA Quiescent Current
•
Thermal Shutdown Protection
APPLICATIONS
•
•
•
•
•
PDA
Cellular/Smart Phone
GPS
Digital Still Camera
Split Supply DSP and µP Solutions:, Samsung
ARM-Based Processors, etc.
DESCRIPTION
The TPS65024x are integrated Power Management
ICs for applications powered by one Li-Ion or
Li-Polymer cell, which require multiple power rails.
The TPS65024x provide three highly efficient,
step-down converters targeted at providing the core
voltage, peripheral, I/O and memory rails in a
processor based system. All three step-down
converters enter a low power mode at light load for
maximum efficiency across the widest possible range
of load currents. The converters can be forced into
fixed frequency PWM mode by pulling the MODE pin
high. The TPS65024x also integrate two general
purpose 200mA LDO voltage regulators, which are
enabled with an external input pin. Each LDO
operates with an input voltage range between 1.5V
and 6.5V allowing them to be supplied from one of
the step-down converters or directly from the battery.
The output voltage of the LDOs can be set with an
external resistor divider for maximum flexibility.
Additionally there is a 30mA LDO typically used to
provide power in a processor based system to a
voltage rail that is always on. TPS65024x provide
voltage scaling on DCDC3 using the DEFDCDC3 pin.
This pin either needs to be connected to a logic HIGH
or logic LOW level to set the output voltage of
DCDC3. TPS65024x come in a small 5mm x 5mm 32
pin QFN package (RHB).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION (1)
VOLTAGE AT
DCDC3
TA
–40°C to
85°C
(1)
OUTPUT CURRENT ON DCDC1
/ DCDC2 / DCDC3
VOLTAGE AT
VDD_ALIVE
PART NUMBER (2)
PACKAGE
1.0V / 1.3V
1.0A / 0.8A / 0.8A
1.2V
TPS650240RHB
0.9V / 1.375V
1.6A / 1.0A / 0.8A
1.2V
TPS650241RHB
1.0V / 1.5V
1.0A / 0.8A / 0.8A
1.2V
1.0V / 1.2V
1.6A / 1.0A / 0.8A
1.2V
1.55V / 1.6V
0.8A / 1.6A / 0.8A
1.2V
TPS650244RHB
0.9V / 1.1V
1.0A / 0.8A / 0.8A
1.1V
TPS650245RHB
TPS650242RHB
32 Pin QFN
(RHB)
TPS650243RHB
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
The RHB package is available in tape and reel. Add R suffix (TPS650240RHBR) to order quantities of 3000 parts per reel. Add T suffix
(TPS650240RHBT) to order quantities of 250 parts per reel.
(2)
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
VALUE
Input voltage range on all pins except A/PGND pins with respect to AGND
UNIT
–0.3 to 7
V
Current at VINDCDC1, L1, PGND1, VINDCDC2, L2, PGND2, VINDCDC3, L3, PGND3
2000
mA
Peak current at all other pins
1000
mA
Continuous total power dissipation
See Dissipation Rating Table
TA
Operating free-air temperature
–40 to 85
°C
TJ
Maximum junction temperature
125
°C
Tst
Storage temperature
–65 to 150
°C
260
°C
Lead temperature 1,6 mm (1/16-inch) from case for 10 seconds
(1)
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATINGS
(1)
2
PACKAGE (1)
RθJA
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
RHB
35K/W
2.85W
28mW/K
1.57W
1.14W
The thermal resistance junction to ambient of the RHB package is measured on a high K board. The thermal resistance junction to
power pad is 1.5k/W.
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
RECOMMENDED OPERATING CONDITIONS
MIN
VINDCDC1,
VINDCDC2,
VINDCDC3, VCC
Input voltage range step-down converters
VDCDC1
NOM
MAX
UNIT
2.5
6.0
V
Output voltage range for VDCDC1 step-down converter (1)
0.6
VINDCDC1
V
VDCDC2
Output voltage range for mem step-down converter (1)
0.6
VINDCDC2
V
VDCDC3
Output voltage range for core step-down converter
0.9
1.5
V
VINLDO1, VINLDO2
Input voltage range for LDOs
1.5
6.5
V
VLDO1-2
Output voltage range for LDOs
1.0
VINLDO1-2
IOUTDCDC1
Output current at L1
L1
Inductor at L1 (2)
1600
1.5
CINDCDC1
Input capacitor at VINDCDC1
(2)
10
COUTDCDC1
Output capacitor at VDCDC1 (2)
10
IOUTDCDC2
Output current at L2
L2
Inductor at L2 (2)
CINDCDC2
Input capacitor at VINDCDC2
(2)
10
COUTDCDC2
Output capacitor at VDCDC2
(2)
10
IOUTDCDC3
Output current at L3
L3
Inductor at L3 (2)
1.5
CINDCDC3
Input capacitor at VINDCDC3 (2)
10
COUTDCDC3
Output capacitor at VDCDC3
µF
µF
22
(2)
10
(2)
mA
µH
2.2
µF
µF
22
800
mA
µH
2.2
µF
µF
22
1
µF
1
µF
2.2
µF
CVCC
Input capacitor at VCC
Cin1-2
Input capacitor at VINLDO (2)
COUT1-2
Output capacitor at VLDO1, VLDO2 (2)
ILDO1,2
Output current at VLDO1, VLDO2
CVRTC
Output capacitor at Vdd_alive (2)
IVdd_alive
Output current at Vdd_alive
TA
Operating ambient temperature
–40
TJ
Operating junction temperature
–40
RCC
Resistor from VINDCDC3,VINDCDC2, VINDCDC1 to Vcc used for filtering (3)
(1)
(2)
(3)
µH
2.2
1600
1.5
V
mA
200
mA
30
mA
85
°C
125
°C
10
Ω
µF
2.2
1
When using an external resistor divider at DEFDCDC2, DEFDCDC1.
See applications section for more information, for Vout > 2.85V choose 3.3µH inductor.
Up to 2.5mA can flow into Vcc when all 3 converters are running in PWM, this resistor will cause the UVLO threshold to be shifted
accordingly.
Copyright © 2007, Texas Instruments Incorporated
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Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
3
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
COMTROL SIGNALS: EN_DCDC1, EN_DCDC2, EN_DCDC3, EN_LDO, MODE, EN_VDD_ALIVE
MAX
UNIT
VIH
PARAMETER
High level input
voltage
TEST CONDITIONS
1.45
MIN
TYP
VCC
V
VIL
Low level input
voltage
0
0.4
V
IH
Input bias current
0.01
0.1
µA
135
170
uA
PFM All 3 DCDC converters enabled, zero load
and no switching, LDO1, LDO2 = OFF, Vdd_alive
= ON
75
100
PFM DCDC1 and DCDC2 converters enabled,
zero load and no switching, LDO1, LDO2 = OFF,
Vdd_alive = ON
55
80
PFM DCDC1 converter enabled, zero load and no
switching, LDO1, LDO2 = OFF, Vdd_alive = ON
40
60
SUPPLY PINS: VCC, VINDCDC1, VINDCDC2, VINDCDC3
I(qPFM)
Operating quiescent
current
IVCC(PWM)
Current into Vcc;
PWM
PFM All 3 DCDC converters enabled, zero load
and no switching, LDOs enabled
Vcc = 3.6V
All 3 DCDC converters enabled & running in PWM, Vcc = 3.6V
LDOs off
PWM DCDC1 and DCDC2 converters enabled and
running in PWM, LDOs off
PWM DCDC1 converter enabled and running in
PWM, LDOs off
Iq
Quiescent current
All converters disabled, LDO1, LDO2 = OFF,
Vdd_alive = OFF
All converters disabled, LDO1, LDO2 = OFF,
Vdd_alive = ON
4
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Vcc = 3.6V
2
mA
1.5
2.5
0.85
2.0
16
µA
26
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDCDC1 STEP-DOWN CONVERTER
VVINDCDC1
Input voltage range
IO
Maximum output current for
TPS650240, TPS650242 and
TPS650245
VO = 3.3V
1000
2.5
6.0
mA
IO
Maximum output current for TPS650241
and TPS650243
VO = 3.3V
1600
mA
IO
Maximum output current for TPS650244
VO = 3.3V
800
ISD
Shutdown supply current in VINDCDC1
EN_DCDC1 = GND
0.1
1
µA
RDS(ON)
P-channel MOSFET on-resistance
VINDCDC1 = VGS = 3.6V
125
261
mΩ
ILP
P-channel leakage current
VINDCDC1 = 6.0V
2
µA
RDS(ON)
N-channel MOSFET on-resistance
VINDCDC1 = VGS = 3.6V
130
260
mΩ
ILN
N-channel leakage current
VDS = 6.0V
7
10
µA
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINMAIN < 6.0V
for TPS650244
0.98
1.10
1.21
A
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINMAIN < 6.0V
for TPS650240, TPS650242 and
TPS650245
1.15
1.30
1.39
A
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINMAIN < 6.0V
for TPS650241 and TPS650243
1.75
1.97
2.15
A
fS
Oscillator frequency
1.95
2.25
2.55
MHz
VDCDC1
Fixed output voltage
MODE=0 (PWM/PFM)
2.80V
Fixed output voltage
MODE=1 (PWM)
2.80V
mA
VINDCDC1 = 3.3V to 6.0V;
0 mA ≤ IO ≤ 1.6A
–2%
2%
–2%
2%
VINDCDC1 = 3.7V to 6.0V;
0 mA ≤ IO ≤ 1.6A
–1%
1%
–1%
1%
Adjustable output voltage with resistor
divider at DEFDCDC1 MODE = 0
(PWM/PFM)
VINDCDC1 = VDCDC1 +0.4V (min 2.5V)
to 6.0V; 0mA ≤ IO ≤ 1.6A
–2%
2%
Adjustable output voltage with resistor
divider at DEFDCDC1; MODE = 1
(PWM)
VINDCDC1 = VDCDC1 +0.4V (min 2.5V)
to 6.0V; 0mA ≤ IO ≤ 1.6A
–1%
1%
Line regulation
VINDCDC1 = VDCDC1 + 0.3V (min. 2.5 V)
to 6.0V; IO = 10mA
3.3V
3.3V
V
0.0
%/V
Load regulation
IO = 10mA to 1.6A
0.25
%/A
TSS
Soft start ramp time
VDCDC1 ramping from 5% to 95% of
target value
750
µs
R(L1)
Internal resistance from L1 to GND
1
MΩ
Copyright © 2007, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
5
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDCDC2 STEP-DOWN CONVERTER
VVINDCDC2
Input voltage range
IO
Maximum output current for
TPS650240, TPS650242 and
TPS650245
VO = 2.5V
800
2.5
6.0
mA
IO
Maximum output current for TPS650241
and TPS650243
VO = 2.5V
1000
mA
IO
Maximum output current for TPS650244
VO = 2.5V
1600
ISD
Shutdown supply current in VINDCDC2
EN_DCDC2 = GND
0.1
1
µA
RDS(ON)
P-channel MOSFET on-resistance
VINDCDC2 = VGS = 3.6V
140
300
mΩ
ILP
P-channel leakage current
VINDCDC2 = 6.0V
2
µA
RDS(ON)
N-channel MOSFET on-resistance
VINDCDC2 = VGS = 3.6V
150
297
mΩ
ILN
N-channel leakage current
VDS = 6.0V
7
10
µA
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINDCDC2 < 6.0V
for TPS650240, TPS650242 and
TPS650245
1.05
1.16
1.29
A
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINDCDC2 < 6.0V
for TPS650241 and TPS650243
1.22
1.35
1.50
A
ILIMF
Forward current limit (P- and N-channel) 2.5V < VINDCDC2 < 6.0V
for TPS650244
1.75
1.97
2.15
A
fS
Oscillator frequency
1.95
2.25
2.55
MHz
VDCDC2
Fixed output voltage
MODE = 0 (PWM/PFM)
mA
1.8V
VINDCDC2 = 2.5V to 6.0V; 0 mA ≤ IO ≤
1.6A
–2%
2%
2.5V
VINDCDC2 = 3.0V to 6.0V; 0 mA ≤ IO ≤
1.6A
–2%
2%
1.8V
VINDCDC2 = 2.5V to 6.0V; 0 mA ≤ IO ≤
1.6A
–2%
2%
2.5V
VINDCDC2 = 3.0V to 6.0V; 0 mA ≤ IO ≤
1.6A
–1%
1%
Adjustable output voltage with resistor
divider at DEFDCDC2 MODE = 0
(PWM)
VINDCDC2 = VDCDC2 + 0.5V (min 2.5V)
to 6.0V; 0mA ≤ IO ≤ 1.6A
–2%
2%
Adjustable output voltage with resistor
divider at DEFDCDC2; MODE = 1
(PWM)
VINDCDC2 = VDCDC2 + 0.5V (min 2.5V)
to 6.0V; 0mA ≤ IO ≤ 1.6A
–1%
1%
Line regulation
VINDCDC2 = VDCDC2 + 0.3 V (min. 2.5
V) to 6.0V; IO = 10mA
Fixed output voltage
MODE = 1 (PWM)
V
0.0
%/V
Load regulation
IO = 10mA to 1.6A
0.25
%/A
TSS
Soft start ramp time
VDCDC2 ramping from 5% to 95% of
target value
750
µs
R(L2)
Internal resistance from L2 to GND
1
MΩ
6
Submit Documentation Feedback
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDCDC3 STEP-DOWN CONVERTER
VVINDCDC3
Input voltage range
IO
Maximum output current
VO = 1.6V
2.5
ISD
Shutdown supply current in
VINDCDC3
EN_DCDC3 = GND
0.1
1
µA
RDS(ON)
P-channel MOSFET on-resistance
VINDCDC3 = VGS = 3.6V
310
698
mΩ
ILP
P-channel leakage current
VINDCDC3 = 6.0V
0.1
2
µA
RDS(ON)
N-channel MOSFET on-resistance
VINDCDC3 = VGS = 3.6V
220
503
mΩ
ILN
N-channel leakage current
VDS = 6.0V
7
10
µA
ILIMF
Forward current limit (P- and
N-channel)
2.5V < VINDCDC3 < 6.0V
1.00
1.20
1.40
A
fS
Oscillator frequency
1.95
2.25
2.55
MHz
VDCDC3
Fixed output voltage VO = 0.9V to
MODE = 0
1.6V
(PWM/PFM)
VINDCDC3 = 2.5V to 6.0V;
0mA ≤ IO ≤ 800mA
–2%
2%
–1%
1%
Fixed output voltage
MODE = 1 (PWM)
Line regulation
VINDCDC3 = VDCDC3 + 0.3V (min. 2.5 V) to
6.0V; IO = 10mA
Load regulation
TSS
Soft start ramp time
R(L3)
Internal resistance from L3 to GND
Copyright © 2007, Texas Instruments Incorporated
6.0
800
V
mA
0.0
%/V
IO = 10mA to 600mA
0.25
%/A
VDCDC3 ramping from 5% to 95% of target
value
750
µs
1
MΩ
Submit Documentation Feedback
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
7
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VLDO1 and VLDO2 Low Dropout Regulators
I(q)
Operating quiescent current
Current per LDO into VINLDO
16
30
µA
I(SD)
Shutdown current
Total current into VINLDO, VLDO = 0V
0.6
2
µA
VINLDO
Input voltage range for LDO1, LDO2
1.5
6.5
V
VLDO1
LDO1 output voltage range
1.0
VinLDO
V
VLDO2
LDO2 output voltage range
1.0
VinLDO
V
VFB
LDO1 and LDO2 feedback voltage
See
IO
Maximum output current for LDO1, LDO2
Vin = 1.8V, Vo = 1.3V
IO
Maximum output current for LDO1, LDO2
Vin = 1.5V; Vo = 1.3V
ISC
LDO1 & LDO2 short circuit current limit
VLDO1 = GND, VLDO2 = GND
400
mA
Minimum voltage drop at LDO1, LDO2
IO = 50mA, VINLDO = 1.8V
120
mV
Minimum voltage drop at LDO1, LDO2
IO = 50mA, VINLDO = 1.5V
150
mV
Minimum voltage drop at LDO1, LDO2
IO = 200mA, VINLDO = 1.8V
300
mV
Output voltage ccuracy for LDO1, LDO2
IO = 10mA
–2%
1%
Line regulation for LDO1, LDO2
VINLDO1,2 = VLDO1,2 + 0.5V (min. 2.5V) to 6.5V,
IO = 10mA
–1%
1%
Load regulation for LDO1, LDO2
IO = 0mA to 200mA
–1%
Regulation time for LDO1, LDO2
Load change from 10% to 90%
10
µs
V
(1)
1.0
V
200
mA
120
65
mA
1%
Vdd_alive Low Dropout Regulator
Vdd_alive
Vdd_alive LDO output voltage, TPS650240 to
TPS650244
IO = 0mA
1.2
Vdd_alive
Vdd_alive LDO output voltage, TPS650245
IO = 0mA
1.1
IO
Output current for Vdd_alive
ISC
Vdd_alive short circuit current limit
Vdd_alive = GND
Output voltage accuracy for Vdd_alive
IO = 0mA
–1%
Line regulation for Vdd_alive
VCC = Vdd_alive + 0.5 V to 6.5 V, IO = 0mA
–1%
Regulation time for Vdd_alive
Load change from 10% to 90%
V
30
mA
100
mA
1%
1%
µs
10
AnaLogic Signals DEFDCDC1, DEFDCDC2, DEFDCDC3
VIH
High level input voltage
1.3
VCC
VIL
Low level input voltage
0
0.1
V
IH
Input bias current
0.05
µA
0.001
V
THERMAL SHUTDOWN
TSD
Thermal shutdown
Increasing junction temperature
160
°C
Thermal shudown hysteresis
Decreasing junction temperature
20
°C
INTERNAL UNDER VOLTAGE LOCK OUT
UVLO
Internal UVLO
VUVLO_HYST
internalUVLO comparator hysteresis
VCC falling
–3%
2.35
3%
120
V
mV
VOLTAGE DETECTOR COMPARATOR
PWRFAIL_SNS
Comparator threshold
Falling threshold
Hysteresis
VOL
(1)
8
–2%
1.0
2%
V
40
50
60
mV
Propagation delay
25mV overdrive
10
µs
Power fail output low voltage
IOL = 5 mA
0.3
V
If the feedback voltage is forced higher than above 1.2V, a leakage current into the feedback pin may occur.
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
DEVICE INFORMATION
DEFDCDC3
AGND1
PWRFAIL_SNS
Vcc
VINDCDC2
L2
PGND2
VDCDC2
PIN ASSIGNMENTS
32 31 30 29 28 27 26 25
VDCDC3
PGND3
L3
VINDCDC3
VINDCDC1
L1
PGND1
VDCDC1
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
TPS65024
EN_Vdd_alive
MODE
DEFDCDC2
PWRFAIL
EN_DCDC1
EN_DCDC2
EN_DCDC3
EN_LDO
DEFDCDC1
FB_LDO2
FB_LDO1
Vdd_alive
AGND2
VLDO2
VINLDO
VLDO1
9 10 11 12 13 14 15 16
TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
I/O
DESCRIPTION
SWITCHING REGULATOR SECTION
AGND1
31
Analog ground connection. All analog ground pins are connected internally on the chip.
AGND2
13
Analog ground connection. All analog ground pins are connected internally on the chip.
PowerPad
–
VINDCDC1
5
L1
6
VDCDC1
8
PGND1
7
VINDCDC2
28
L2
27
VDCDC2
25
PGND2
26
VINDCDC3
4
L3
3
VDCDC3
1
PGND3
2
Vcc
29
I
Power supply for digital and analog circuitry of DCDC1, DCDC2 and DCDC3 DC-DC converters. This must be
connected to the same voltage supply as VINDCDC3, VINDCDC1 and VINDCDC2.
DEFDCDC1
9
I
Input signal indicating default VDCDC1 voltage, 0 = 2.80V, 1 = 3.3V
Connect the power pad to analog ground.
I
Input voltage for VDCDC1 step-down converter. This must be connected to the same voltage supply as
VINDCDC2, VINDCDC3 and VCC.
Switch pin of VDCDC1 converter. The VDCDC1 inductor is connected here.
I
VDCDC1 feedback voltage sense input, connect directly to VDCDC1
Power ground for VDCDC1 converter
I
Input voltage for VDCDC2 step-down converter. This must be connected to the same voltage supply as
VINDCDC1, VINDCDC3 and VCC.
Switch pin of VDCDC2 converter. The VDCDC2 inductor is connected here.
I
VDCDC2 feedback voltage sense input, connect directly to VDCDC2
Power ground for VDCDC2 converter
I
Input voltage for VDCDC3 step-down converter. This must be connected to the same voltage supply as
VINDCDC1, VINDCDC2 and VCC.
Switch pin of VDCDC3 converter. The VDCDC3 inductor is connected here.
I
VDCDC3 feedback voltage sense input, connect directly to VDCDC3
Power ground for VDCDC3 converter
This pin can also be connected to a resistor divider between VDCDC1 and GND. In this case the output
voltage of the DCDC1 converter can be set in a range from 0.6V to VINDCDC1
DEFDCDC2
22
I
Input signal indicating default VDCDC2 voltage, 0=1.8V, 1=2.5V
This pin can also be connected to a resistor divider between VDCDC2 and GND. In this case the output
voltage of the DCDC2 converter can be set in a range from 0.6V to VINDCDC2.
Copyright © 2007, Texas Instruments Incorporated
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
TERMINAL FUNCTIONS (continued)
TERMINAL
NAME
NO.
I/O
DESCRIPTION
DEFDCDC3
32
I
Input signal indicating VDCDC3 voltage.
TPS650240: 0 = 1.0V, 1 = 1.3V
TPS650241: 0 = 0.9V, 1 = 1.375V
TPS650242: 0 = 1.0V, 1 = 1.5V
TPS650243: 0 = 1.0V, 1 = 1.2V
TPS650244: 0 = 1.55V, 1 = 1.6V
TPS650245: 0 = 0.9V, 1 = 1.1V
EN_DCDC1
20
I
VDCDC1 enable pin. A logic high enables the regulator, a logic low disables the regulator.
EN_DCDC2
19
I
VDCDC2 enable pin. A logic high enables the regulator, a logic low disables the regulator.
EN_DCDC3
18
I
VDCDC3 enable pin. A logic high enables the regulator, a logic low disables the regulator.
LDO REGULATOR SECTION
VINLDO
15
I
Input voltage for LDO1 and LDO2
VLDO1
16
O
Output voltage of LDO1
VLDO2
14
O
Output voltage of LDO2
EN_LDO
17
I
Enable input for LDO1 and LDO2. Logic high enables the LDOs, logic low disables the LDOs
EN_Vdd_alive
24
I
Enable input for Vdd_alive LDO. Logic high enables the LDO, logic low disables the LDO
Vdd_alive
12
O
Output voltage for Vdd_alive
FB_LDO1
11
I
Feedback pin for LDO1
FB_LDO2
10
I
Feedback pin for LDO2
CONTROL AND I2C SECTION
MODE
23
I
Select between Power Safe Mode and forced PWM Mode for DCDC1, DCDC2 and DCDC3. In Power Safe
Mode PFM is used at light loads, PWM for higher loads. If PIN is set to high level, forced PWM Mode is
selected. If Pin has low level, then Device operates in Power Safe Mode.
PWRFAIL
21
O
Open drain output. Active low when PWRFAIL comparator indicates low VBAT condition.
PWRFAIL_SNS
30
I
Input for the comparator driving the /PWRFAIL output
10
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
FUNCTIONAL BLOCK DIAGRAM
TPS650240
1R
VCC
Vbat
1mF
L1
VINDCDC 1
Vbat
10mF
DCDC1 (I/O)
ENABLE
STEP-DOWN
CONVERTER
1000 mA
EN_DCDC 1
VINDCDC 2
Vbat
DCDC 2
(memory)
10mF
STEP-DOWN
CONVERTER
800 mA
EN_DCDC 2
ENABLE
VINDCDC 3
Vbat
VDCDC1
R1
22 mF
DEFDCDC 1
PGND 1
R2
2.5V or 1.8V
L2
VDCDC2
2.2 mH
STEP-DOWN
CONVERTER
800 mA
DEFDCDC 3
EN_DCDC 3
R3
22 mF
DEFDCDC 2
PGND 2
R4
1.0V or 1.3V
L3
DCDC 3 (core)
10mF
1.0V / 1.3V
ENABLE
3.3V or 2.8V
2.2 mH
VDCDC 3
2.2uH
22 mF
PGND 3
MODE
PWM / PFM
VIN_LDO
VIN
VLDO 1
VLDO1
R5
200 mA LDO
EN_LDO
ENABLE
2.2 mF
R6
VLDO 2
VLDO2
R7
200 mA LDO
R8
EN_Vdd_aliv
e
ENABLE
VCC
Vbat
2.2 mF
VLDO 3
30 mA LDO
Vdd_alive
1.2 V
2.2 mF
R9
I/O voltage
PWRFAIL _SNS
R10
-
PWRFAIL
R19
+
Vref = 1 V
AGND 1
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AGND2
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
TYPICAL CHARACTERISTICS
Parameter Measurement Information
Graphs were taken using the EVM with the following inductor/output capacitor combinations:
CONVERTER
INDUCTOR
OUTPUT CAPACITOR
OUTPUT CAPACITOR
VALUE
DCDC1
VLCF4020-3R3
C2012X5R0J226M
22µF
DCDC2
VLCF4020-2R2
C2012X5R0J226M
22µF
DCDC3
LPS3010-222
C2012X5R0J226M
22µF
Table of Graphs
FIGURE
η
Efficiency VDCDC1
vs Load current PWM/PFM; VO = 3.3V
Figure 1
η
Efficiency VDCDC1
vs Load current PWM; VO = 3.3V
Figure 2
η
Efficiency VDCDC2
vs Load current PWM/PFM; VO = 1.8V
Figure 3
η
Efficiency VDCDC2
vs Load current PWM; VO = 1.8V
Figure 4
η
Efficiency VDCDC3
vs Load current PWM/PFM; VO = 1.3V
Figure 5
η
Efficiency VDCDC3
vs Load current PWM; VO = 1.3V
Figure 6
12
Line transient response VDCDC1
Figure 7
Line transient response VDCDC2
Figure 8
Line transient response VDCDC3
Figure 9
Load transient response VDCDC1
Figure 10
Load transient response VDCDC2
Figure 11
Load transient response VDCDC3
Figure 12
Output voltage ripple DCDC2; PFM mode
Figure 13
Output voltage ripple DCDC2; PWM mode
Figure 14
Load regulation for Vdd_alive
Figure 15
Start-up VDCDC1 to VDCDC3
Figure 16
Start-up LDO1 and LDO2
Figure 17
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
DCDC1: EFFICIENCY
vs
OUTPUT CURRENT
100
100
90
90
VI = 3.8 V
80
VI = 4.2 V
70
VI = 5 V
60
50
40
60
VI = 3.8 V
50
VI = 4.2 V
40
30
30
VI = 5 V
TA = 25°C,
VO = 3.3 V,
PFM/PWM Mode
20
10
0
0.1
TA = 25°C,
VO = 3.3 V,
PWM Mode
80
Efficiency - %
70
Efficiency - %
DCDC1: EFFICIENCY
vs
OUTPUT CURRENT
1
10
100
1k
IO - Output Current - mA
20
10
0
0.1
10k
1
10
100
1k
IO - Output Current - mA
Figure 1.
Figure 2.
DCDC2: EFFICIENCY
vs
OUTPUT CURRENT
DCDC2: EFFICIENCY
vs
OUTPUT CURRENT
10k
VI = 2.5 V
VI = 3.8 V
Efficiency - %
Efficiency - %
VI = 3.8 V
VI = 4.2 V
VI = 4.2 V
VI = 2.5 V
VI = 5 V
VI = 5 V
TA = 25oC
VO = 1.8 V
PWM Mode
TA = 25oC
VO = 1.8 V
PWM / PFM Mode
0.01
0.1
1
10
100
1k
10 k
0.01
0.1
1
10
100
IO - Output Current - mA
IO - Output Current - mA
Figure 3.
Figure 4.
Copyright © 2007, Texas Instruments Incorporated
1k
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10 k
13
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
DCDC3: EFFICIENCY
vs
OUTPUT CURRENT
DCDC3: EFFICIENCY
vs
OUTPUT CURRENT
100
100
TA = 25°C,
90 VO = 1.5 V,
PWM/PFM Mode
80
80
60
VI = 3 V
50
VI = 3.8 V
30
VI = 2.5 V
70
VI = 2.5 V
Efficiency - %
Efficiency - %
70
40
TA = 25°C,
VO = 1.5 V,
PWM Mode
90
VI = 3 V
VI = 3.8 V
60
50
VI = 4.2 V
40
VI = 5 V
30
VI = 4.2 V
20
20
VI = 5 V
10
0
0.01
0.1
10
1
10
100
IO - Output Current - mA
1k
0
0.01
0.1
1
10
100
IO - Output Current - mA
Figure 5.
Figure 6.
VDCDC1 LINE TRANSIENT RESPONSE
VDCDC2 LINE TRANSIENT RESPONSE
1k
Ch1 = VI
Ch2 = VO
Ch1 = VI
Ch2 = VO
IO = 100 mA
VI = 3 V to 4 V
VO = 1.8 V
PWM Mode
IO = 100 mA
VI = 3.8 V to 4.5 V
VO = 3.3 V
Figure 7.
14
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Figure 8.
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TPS650244, TPS650245
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
VDCDC3 LINE TRANSIENT RESPONSE
VDCDC1 LOAD TRANSIENT RESPONSE
Ch1 = VI
Ch1 = VI
Ch2 = VO
Ch2 = VO
IO = 160 mA to 14000 mA
VI = 3.3 V
VO = 4.2 V
IO = 100 mA
VI = 3 V to 4 V
VO = 1.375 V
Figure 9.
Figure 10.
VDCDC2 LOAD TRANSIENT RESPONSE
VDCDC3 LOAD TRANSIENT RESPONSE
Ch4 = IO
Ch4 = IO
Ch2 = VO
Ch2 = VO
IO = 100 mA to 900 mA
VO = 1.8 V
Figure 11.
Copyright © 2007, Texas Instruments Incorporated
IO = 80 mA to 720 mA
VO = 1.375 V
Figure 12.
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
VDCDC2 OUTPUT VOLTAGE RIPPLE
VDCDC2 OUTPUT VOLTAGE RIPPLE
IO = 1 mA
TA = 25oC
PFM Mode
VI = 3.8 V
VO = 1.8 V
VI = 3.8 V
VO = 1.8 V
IO = 1 mA
TA = 25oC
PWM Mode
Figure 13.
Figure 14.
VDD_ALIVE OUTPUT VOLTAGE
vs
OUTPUT CURRENT
STARTUP VDCDC1, VDCDC2, VDCDC3
1.26
ENABLE
VCC = 3.6 V
VO - Output Voltage - V
1.24
VDCDC1
1.22
1.2
VDCDC2
1.18
VDCDC3
1.16
1.14
0
5
10
15
20
25
30 35
IO - Output Current - mA
Figure 15.
16
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40
45
Figure 16.
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TPS650244, TPS650245
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
STARTUP LDO1 AND LDO2
ENABLE
LDO1
LDO2
Figure 17.
DETAILED DESCRIPTION
STEP-DOWN CONVERTERS, VDCDC1, VDCDC2 AND VDCDC3
The TPS65024x incorporate three synchronous step-down converters operating typically at 2.25MHz fixed
frequency PWM (Pulse Width Modulation) at moderate to heavy load currents. At light load currents the
converters automatically enter Power Save Mode and operate with PFM (Pulse Frequency Modulation).
VDCDC1 delivers up to 1.6A, VDCDC2 is capable of delivering up to 1.0A of output current while the VDCDC3
converter is capable of delivering up to 800mA.
The converter output voltages can be programmed via the DEFDCDC1, DEFDCDC2 and DEFDCDC3 pins. The
pins can either be connected to GND, VCC or to a resistor divider between the output voltage and GND. The
VDCDC1 converter defaults to 2.80V or 3.3V depending on the DEFDCDC1 configuration pin, if DEFDCDC1 is
tied to ground the default is 2.80V, if it is tied to VCC the default is 3.3V. When the DEFDCDC1 pin is connected
to a resistor divider, the output voltage can be set in the range of 0.6V to VINDCDC1 V. Reference the section
on Output Voltage Selection for details on setting the output voltage range.
The VDCDC2 converter defaults to 1.8V or 2.5V depending on the DEFDCDC2 configuration pin, if DEFDCDC2
is tied to ground the default is 1.8V, if it is tied to VCC the default is 2.5V. When the DEFDCDC2 pin is
connected to a resistor divider, the output voltage can be set in the range of 0.6V to VINDCDC2 V.
The VDCDC3 converter defaults to 1.0V or 1.3V for the TPS650240 depending on the DEFDCDC3 configuration
pin, if DEFDCDC3 is tied to ground the default is 1.0V, if it is tied to VCC the default is 1.3V. The DEFDCDC3
pin cannot be connected to a resistor divider. In opposition to DEFDCDC1 and DEFDCDC2, the DEFDCDC3 pin
can be used to change the core voltage during operation by changing its logic level from HIGH to LOW or vice
versa. TPS650241 to TPS650245 allow different voltages for the VDCDC3 converter. Reference Table 4 for the
TPS650240, TPS650241, TPS650242, TPS650243, TPS650244 and TPS650245 default voltage options.
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During PWM operation the converters use a unique fast response voltage mode controller scheme with input
voltage feed-forward to achieve good line and load regulation allowing the use of small ceramic input and output
capacitors. At the beginning of each clock cycle initiated by the clock signal, the P-channel MOSFET switch is
turned on and the inductor current ramps up until the comparator trips and the control logic turns off the switch.
The current limit comparator also turns off the switch in case the current limit of the P-channel switch is
exceeded. After the adaptive dead time used to prevent shoot through current, the N-channel MOSFET rectifier
is turned on and the inductor current ramps down. The next cycle is initiated by the clock signal again turning off
the N-channel rectifier and turning on the P-channel switch.
The three DC/DC converters operate synchronized to each other, with the VDCDC1 converter as the master. A
180° phase shift between the VDCDC1 switch turn on and the VDCDC2 and a further 90° shift to the VDCDC3
switch turn on decreases the input RMS current and smaller input capacitors can be used. This is optimized for a
typical application where the VDCDC1 converter regulates a Li-Ion battery voltage of 3.7V to 3.3V, the VDCDC2
converter from 3.7V to 2.5V and the VDCDC3 converter from 3.7V to 1.5V.
POWER SAVE MODE OPERATION
As the load current decreases, the converters enter Power Save Mode operation. During Power Save Mode the
converters operate in a burst mode (PFM mode) with a frequency between 1.125MHz and 2.25MHz for one burst
cycle. However, the frequency between different burst cycles depends on the actual load current and is typically
far less than the switching frequency, with a minimum quiescent current to maintain high efficiency.
In order to optimize the converter efficiency at light load the average current is monitored and if in PWM mode
the inductor current remains below a certain threshold, then Power Save Mode is entered. The typical threshold
to enter Power Save Mode can be calculated as follows:
I PFMDCDC1enter + VINDCDC 1
24 W
I PFMDCDC2enter + VINDCDC 2
26 W
I PFMDCDC3leave + VINDCDC 3
39 W
(1)
During Power Save Mode the output voltage is monitored with a comparator and by maximum skip burst width.
As the output voltage falls below the threshold, set to the nominal VO, the P-channel switch turns on and the
converter effectively delivers a constant current as defined below.
I PFMDCDC1leave + VINDCDC 1
18 W
I PFMDCDC2leave + VINDCDC 2
20 W
I PFMDCDC3enter + VINDCDC 3
29 W
(2)
If the load is below the delivered current then the output voltage rises until the same threshold is crossed in the
other direction. All switching activity ceases, reducing the quiescent current to a minimum until the output voltage
has again dropped below the threshold. The power save mode is exited, and the converter returns to PWM mode
if either of the following conditions are met:
1. The output voltage drops 2% below the nominal VO due to increased load current
2. The PFM burst time exceeds 16 × 1/fs (7.1µs typical)
These control methods reduce the quiescent current to typically 14µA per converter and the switching activity to
a minimum thus achieving the highest converter efficiency. Setting the comparator thresholds at the nominal
output voltage at light load current results in a very low output voltage ripple. The ripple depends on the
comparator delay and the size of the output capacitor; increasing capacitor values makes the output ripple tend
to zero. Power Save Mode can be disabled by pulling the MODE pin high. This forces all DC/DC converters into
fixed frequency PWM mode.
18
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
SOFT START
Each of the three converters has an internal soft start circuit that limits the inrush current during start-up. The soft
start is realized by using a very low current to initially charge the internal compensation capacitor. The soft start
time is typically 750µs if the output voltage ramps from 5% to 95% of the final target value. If the output is
already pre-charged to some voltage when the converter is enabled, then this time is reduced proportionally.
There is a short delay of typically 170µs between the converter being enabled and switching activity actually
starting. This is to allow the converter to bias itself properly, to recognize if the output is pre-charged, and if so, to
prevent discharging of the output while the internal soft start ramp catches up with the output voltage.
100% DUTY CYCLE LOW DROPOUT OPERATION
The TPS65024x converters offer a low input to output voltage difference while still maintaining operation with the
use of the 100% duty cycle mode. In this mode the P-channel switch is constantly turned on. This is particularly
useful in battery-powered applications to achieve the longest operation time by taking full advantage of the whole
battery voltage range. The minimum input voltage required to maintain DC regulation depends on the load
current and output voltage and can be calculated as:
Vin min + Vout min ) Iout max
ǒRDSonmax ) R LǓ
(3)
With:
Ioutmax = Maximum load current (note: ripple current in the inductor is zero under these conditions)
RDSonmax = Maximum P-channel switch RDSon
RL = DC resistance of the inductor
Voutmin = Nominal output voltage minus 2% tolerance limit
LOW DROPOUT VOLTAGE REGULATORS
The low dropout voltage regulators are designed to operate well with low value ceramic input and output
capacitors. They operate with input voltages down to 1.5V. The LDOs offer a maximum dropout voltage of
300mV at the rated output current. Each LDO sports a current limit feature. Both LDOs are enabled by the
EN_LDO pin. The LDOs also have reverse conduction prevention. This allows the possibility to connect external
regulators in parallel in systems with a backup battery. The TPS65024x step-down and LDO voltage regulators
automatically power down when the Vcc voltage drops below the UVLO threshold or when the junction
temperature rises above 160°C.
UNDERVOLTAGE LOCKOUT
The undervoltage lockout circuit for the five regulators on the TPS65024x prevents the device from
malfunctioning at low input voltages and from excessive discharge of the battery. It disables the converters and
LDOs. The UVLO circuit monitors the Vcc pin; the threshold is set internally to 2.35V with 5% (120mV)
hysteresis. Note that when any of the DC/DC converters are running there is an input current at the Vcc pin,
which can be up to 3mA when all three converters are running in PWM mode. This current needs to be taken
into consideration if an external RC filter is used at the Vcc pin to remove switching noise from the TPS65024x
internal analog circuitry supply. See the Vcc-Filter section for details on the external RC filter.
POWER-UP SEQUENCING
The TPS65024x power-up sequencing is designed to be entirely flexible and customer driven; this is achieved
simply by providing separate enable pins for each switch-mode converter and a common enable signal for LDO1
and LDO2. The relevant control pins are described in Table 1.
Table 1. Control Pins for DCDC Converters
PIN NAME
INPUT/
OUTPUT
DEFDCDC3
I
Defines the default voltage of the VDCDC3 switching converter. See table 4 for details.
DEFDCDC2
I
Defines the default voltage of the VDCDC2 switching converter. DEFDCDC2 = 0 defaults VDCDC2 to 1.8V,
DEFDCDC2 = VCC defaults VDCDC2 to 2.5V.
DEFDCDC1
I
Defines the default voltage of the VDCDC1 switching converter. DEFDCDC1 = 0 defaults VDCDC1 to 2.80V,
DEFDCDC1 = VCC defaults VDCDC1 to 3.3V.
FUNCTION
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19
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TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
Table 1. Control Pins for DCDC Converters (continued)
PIN NAME
INPUT/
OUTPUT
EN_DCDC3
I
Set EN_DCDC3 = 0 to disable or EN_DCDC3 = 1 to enable the VDCDC3 converter
EN_DCDC2
I
Set EN_DCDC2 = 0 to disable or EN_DCDC2 = 1 to enable the VDCDC2 converter
EN_DCDC1
I
Set EN_DCDC1 = 0 to disable or EN_DCDC1 = 1 to enable the VDCDC1 converter
FUNCTION
PWRFAIL
The PWRFAIL signal is generated by a voltage detector at the PWRFAIL_SNS input. The input signal is
compared to a 1V threshold (falling edge) with 5% (50mV) hysteresis. PWRFAIL is an open drain output which is
actively low when the input voltage at PWRFAIL_SNS is below the threshold.
DESIGN PROCEDURE
Inductor Selection for the dcdc Converters
The three converters operate with 2.2uH output inductors. Larger or smaller inductor values can be used to
optimize performance of the device for specific conditions. The selected inductor has to be rated for its dc
resistance and saturation current. The dc resistance of the inductor influences directly the efficiency of the
converter. Therefore, an inductor with the lowest dc resistance should be selected for the highest efficiency.
For a fast transient response, a 2.2µH inductor in combination with a 22µF output capacitor is recommended. For
an output voltage above 2.8V, an inductor value of 3.3µH minimum is required. Lower values result in an
increased output voltage ripple in PFM mode. The minimum inductor value is 1.5µH, but an output capacitor of
22µF minimum is needed in this case.
Equation 4 calculates the maximum inductor current under static load conditions. The saturation current of the
inductor should be rated higher than the maximum inductor current as calculated with Equation 4. This is
recommended because during heavy load transient the inductor current rises above the calculated value.
1 * Vout
DI
Vin
DI L + Vout
I Lmax + I outmax ) L
2
L ƒ
(4)
With:
f = Switching frequency (2.25 MHz typical)
L = Inductor value
ΔIL = Peak-to-peak inductor ripple current
ILmax = Maximum inductor current
The highest inductor current occurs at maximum Vin.
Open core inductors have a soft saturation characteristic and they can usually handle higher inductor currents
versus a comparable shielded inductor.
A more conservative approach is to select the inductor current rating just for the maximum switch current of the
corresponding converter. Consideration must be given to the difference in the core material from inductor to
inductor which has an impact on efficiency especially at high switching frequencies. See Table 2 and the typical
applications for possible inductors.
Table 2. Tested Inductors
DEVICE
20
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INDUCTOR
VALUE
TYPE
COMPONENT
SUPPLIER
3.3µH
LPS3015-332 (output current up to 1A)
Coilcraft
2.2µH
LPS3015-222 (output current up to 1A)
Coilcraft
3.3µH
VLCF4020T-3R3N1R5
TDK
2.2µH
VLCF4020T-2R2N1R7
TDK
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
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SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
Table 2. Tested Inductors (continued)
DEVICE
INDUCTOR
VALUE
TYPE
COMPONENT
SUPPLIER
2.2µH
LPS3010-222
Coilcraft
2.2µH
LPS3015-222
Coilcraft
2.2µH
VLCF4020-2R2
TDK
DCDC3 converter
Output Capacitor Selection
The advanced Fast Response voltage mode control scheme of the inductive converters implemented in the
TPS65024x allows the use of small ceramic capacitors with a typical value of 10uF for each converter, without
having large output voltage under and overshoots during heavy load transients. Ceramic capacitors having low
ESR values have the lowest output voltage ripple and are recommended. Refer to Table 3 for recommended
components.
If ceramic output capacitors are used, the capacitor RMS ripple current rating will always meet the application
requirements. For completeness, the RMS ripple current is calculated as:
1 * Vout
Vin
1
I RMSCout + Vout
L ƒ
2 Ǹ3
(5)
At nominal load current the inductive converters operate in PWM mode and the overall output voltage ripple is
the sum of the voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and
discharging the output capacitor:
1 * Vout
Vin
1
DVout + Vout
) ESR
8 Cout ƒ
L ƒ
(6)
ǒ
Ǔ
Where the highest output voltage ripple occurs at the highest input voltage, Vin.
At light load currents the converters operate in Power Save Mode and output voltage ripple is dependent on the
output capacitor value. The output voltage ripple is set by the internal comparator delay and the external
capacitor. Typical output voltage ripple is less than 1% of the nominal output voltage.
Input Capacitor Selection
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is
required for best input voltage filtering and minimizing interference with other circuits caused by high input
voltage spikes. Each dcdc converter requires a 10uF ceramic input capacitor on its input pin VINDCDCx. The
input capacitor can be increased without any limit for better input voltage filtering. The Vcc pin should be
separated from the input for the DC/DC converters. A filter resistor of up to 10Ω and a 1µF capacitor should be
used for decoupling the Vcc pin from switching noise. Note that the filter resistor may affect the UVLO threshold
since up to 3mA can flow via this resistor into the Vcc pin when all converters are running in PWM mode.
Table 3. Possible Capacitors
CAPACITOR
VALUE
CASE SIZE
22µF
1206
TDK
C3216X5R0J226M
Ceramic
22µF
1206
Taiyo Yuden
JMK316BJ226ML
Ceramic
22µF
0805
TDK
C2012X5R0J226MT
Ceramic
22µF
0805
Taiyo Yuden
JMK212BJ226MG
Ceramic
10µF
0805
Taiyo Yuden
JMK212BJ106M
Ceramic
10µF
0805
TDK
C2012X5R0J106M
Ceramic
COMPONENT SUPPLIER
COMMENTS
Output Voltage Selection
The DEFDCDC1, DEFDCDC2, and DEFDCDC3 pins are used to set the output voltage for each step-down
converter. See Table 4 for the default voltages if the pins are pulled to GND or to Vcc.
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21
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
Table 4. Voltage Options
PIN
DEFDCDC1
DEFDCDC2
DEFDCDC3
LEVEL
All versions
All versions
TPS650240
TPS650241
TPS650242
TPS650243
TPS650244
TPS650245
DEFAULT OUTPUT VOLTAGE
VCC
3.3V
GND
2.80V
VCC
2.5V
GND
1.8V
VCC
1.3V
GND
1.0V
VCC
1.375V
GND
0.9V
VCC
1.5V
GND
1.0V
VCC
1.2V
GND
1.0V
VCC
1.6V
GND
1.55V
VCC
1.1V
GND
0.9V
If a different voltage is needed, an external resistor divider can be added to the DEFDCDC1 or DEFDCDC2 pin
as shown below:
10 R
Vbat
VCC
1 mF
VDCDC1
L1
VINDCDC1
CIN
VOUT
L
COUT
EN_DCDC1
R1
DEFDCDC1
R2
AGND
PGND
When a resistor divider is connected to DEFDCDC1 or DEFDCDC2, the output voltage can be set from 0.6V up
to the input voltage Vbat. The total resistance (R1+R2) of the voltage divider should be kept in the 1MΩ range in
order to maintain a high efficiency at light load. VDEFDCDCx = 0.6V
V OUT + VDEFDCDCx
R1 ) R2
R2
R1 + R2
ǒ
V OUT
VDEFDCDCx
Ǔ
* R2
Voltage Change on VDCDC3
The output voltage of VDCDC3 can be changed during operation from e.g. 1.0V to 1.3V (TPS650240) and back.
While the output voltage at VDCDC1 and VDCDC2 is fixed after the device exits undervoltage lockout (UVLO),
the status of the DEFDCDC3 pin is sensed during operation and the voltage is changed as soon as the logic
level on this pin changes from low to high or vice versa. Therefore it is not possible to connect a resistor divider
to DEFDCDC3 and set a voltage different from the predefined voltages.
22
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TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
Vdd_alive Output
The Vdd_alive LDO is typically connected to the Vdd_alive input of the Samsung application processor. It
provides an output voltage of 1.2V at 30mA. For the TPS650245, the output voltage is 1.1V. It is recommended
to add a capacitor of 2.2µF minimum to the Vdd_alive pin. The LDO can be disabled by pulling the
EN_Vdd_alive pin to GND.
LDO1 and LDO2
The LDOs in the TPS65024x are general purpose LDOs which are stable using ceramics capacitors. The
minimum output capacitor required is 2.2µF. The LDOs output voltage can be changed to different voltages
between 1.0V and Vin using an external resistor divider. Therefore they can also be used as general purpose
LDOs in the application. The supply voltage for the LDOs needs to be connected to the VINLDO pin, giving the
flexibility to connect the lowest voltage available in the system and therefore providing the highest efficiency.
The total resistance (R5+R6) of the voltage divider should be kept in the 1MΩ range in order to maintain high
efficiency at light load. VFBLDOx= 1.0V.
V OUT + VFBLDOx
R5 ) R6
R6
R5 + R6
ǒ
V OUT
VFBLDOx
Ǔ
* R6
Vcc-Filter
An RC filter connected at the Vcc input is used to keep noise from the internal supply for the bandgap and other
analog circuitry. A typical value of 1Ω and 1µF is used to filter the switching spikes, generated by the DC/DC
converters. A larger resistor than 10Ω should not be used because the current into Vcc of up to 2.5mA causes a
voltage drop at the resistor causing the undervoltage lockout circuitry connected at Vcc internally to switch off too
early.
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23
TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
APPLICATION INFORMATION
TYPICAL CONFIGURATION FOR THE TITAN 2 PROCESSOR
The core voltage is generated using DCDC2 with the output voltage set to 1.2V using a resistor divider at
DEFDCDC2 as only DCDC2 can support an output current of up to 1.6A. DCDC3 is used for the memory voltage
of 1.8V. As DCDC3 does not support an external resistor divider, the output voltage is programmed to 1.6V by
setting DEFDCDC3 = HIGH. In addition, there is a resistor at the input of the internal voltage divider at pin
VDCDC3 which adds another 200mV. The internal resistance at VDCDC3 when programmed to 1.6V is 480kΩ,
so the external resistance needed to increase the output voltage from 1.6V to 1.8V is 60kΩ (62kΩ). The typical
configuration for the Titan 2 processor is shown in Figure 18.
Vcc
VIN
Titan
TPS650244
1mF
VINDCDC1
VIN
10mF
3.3mH LPS3015
L1
VINDCDC2
VIN
DCDC1
800mA
10mF
VINDCDC3
VIN
VDDIO (3.3V)
10mF
VDCDC1
2.2mH LPS3015
L3
VDD _ MEM (1.8V)
10mF
DCDC3
800mA
DEFDCDC1
VIN
DEFDCDC3
(set to1.8V)
VIN
DCDC2
1600mA
VDCDC2
220kW
62kW
22mF
VDCDC3
L2
2.2mH VLCF4020
core (1.2V)
VDCDC2
22mF
DEFDCDC2
LDO2
RTC I /O (3.3V)
220kW
LDO2
200mA
EN_DCDC1
2.2mF
130kW
EN_DCDC2
LDO1
EN_DCDC3
VIN
300kW
FB_LDO2
LDO1
200mA
100kW
FB_LDO1
RTC core (1.2V)
2.2mF
510kW
VINLDO1/2
1mF
Vdd_alive 1.2V
(not used)
open
EN_LDO1/2
VIO
1MW
EN_VDDalive
PWRFAIL_SNS
Input Voltage
TBD
POWERFAIL
+
Figure 18. Titan Processor Configuration
24
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TPS650240,, TPS650241
TPS650242, TPS650243
TPS650244, TPS650245
www.ti.com
SLVS774A – JUNE 2007 – REVISED DECEMBER 2007
TYPICAL CONFIGURATION FOR THE SAMSUNG PROCESSOR S3C6400-533MHz
The typical configuration for the Samsung processor S3C6400-533MHz is shown in Figure 19.
S3C6400533MHz
Vcc
VIN
TPS650245
1mF
VIN
VDDMMC (3.3V)
VINDCDC1
DCDC1
1000mA
10mF
VIN VINDCDC2
10mF
VIN
VDDEXT (3.3V)
3.3mH
L1
VDDHI (3.3V)
10mF
L2
DCDC2
800mA
VINDCDC3
VDDLCD (3.3V)
VDDPCM (3.3V)
VDCDC1
VDDSYS (3.3V)
2.2mH
VDCDC2
VDD_MEM0 (1.8V)
VDD_MEM1 (1.8V)
10mF
10mF
DCDC3
800mA
DEFDCDC1
VIN
L3
10mF
LDO2
300kW
LDO2
200mA
FB_LDO2
DEFDCDC3
VDDADC (3.3V)
VDDDAC (3.3V)
2.2mF
VDDOTG (3.3V)
VDDUH (3.3V)
130kW
LDO1
EN_DCDC1
LDO1
200mA
EN_DCDC2
EN_DCDC3
VDDOTGI (1.1V)
33kW
FB_LDO1
2.2mF
330kW
VINLDO1/2
VIN
VDDARM (0.9V/1.1V)
VDCDC3
DEFDCDC2
0.9V/1.1V
2.2mH
1 mF
Vdd_alive 1.1V
VDDALIVE
EN_LDO1/2
1mF
VIO
VIN
EN_VDDalive
VIN
1MW
R2
PWRFAIL
PWRFAIL_SNS
-
R3
1V
+
GND
APLL (1.0V)
2.2mH
EPLL (1.0V)
MPLL (1.0V)
VIN
VIN
10mF
AGND , PowerPAD
VDDINT (1.0V)
SW
EN
EN
TPS62260
MODE
FB 22pF
GND
100kW
10mF
150kW
Figure 19. Samsung Processor Configuration
Copyright © 2007, Texas Instruments Incorporated
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25
PACKAGE OPTION ADDENDUM
www.ti.com
20-Mar-2008
PACKAGING INFORMATION
(1)
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TPS650240RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650240RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650240RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650240RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650241RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650241RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650241RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650241RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650242RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650242RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650242RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650242RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650243RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650243RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650243RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650243RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650244RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650244RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650244RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650244RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650245RHBR
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650245RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650245RHBT
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TPS650245RHBTG4
ACTIVE
QFN
RHB
32
250
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
The marketing status values are defined as follows:
Addendum-Page 1
Lead/Ball Finish
MSL Peak Temp (3)
PACKAGE OPTION ADDENDUM
www.ti.com
20-Mar-2008
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
11-Mar-2008
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
TPS650240RHBR
QFN
RHB
32
SPQ
Reel
Reel
Diameter Width
(mm) W1 (mm)
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
W
Pin1
(mm) Quadrant
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650240RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650241RHBR
QFN
RHB
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650241RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650242RHBR
QFN
RHB
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650242RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650243RHBR
QFN
RHB
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650243RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650244RHBR
QFN
RHB
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650244RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650245RHBR
QFN
RHB
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
TPS650245RHBT
QFN
RHB
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
11-Mar-2008
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
TPS650240RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650240RHBT
QFN
RHB
32
250
190.5
212.7
31.8
TPS650241RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650241RHBT
QFN
RHB
32
250
190.5
212.7
31.8
TPS650242RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650242RHBT
QFN
RHB
32
250
190.5
212.7
31.8
TPS650243RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650243RHBT
QFN
RHB
32
250
190.5
212.7
31.8
TPS650244RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650244RHBT
QFN
RHB
32
250
190.5
212.7
31.8
TPS650245RHBR
QFN
RHB
32
3000
346.0
346.0
29.0
TPS650245RHBT
QFN
RHB
32
250
190.5
212.7
31.8
Pack Materials-Page 2
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