ETC PT6715C

PT6715 Series
13-A 5V/3.3V-Input Adjustable
Integrated Switching Regulator
SLTS100B
(Revised 9/5/2002)
Features
•
•
•
•
•
•
•
•
•
13-A Output Current
Single Device: 3.3V/5V Input
90% Efficiency (PT6715)
On/Off Standby Function
Differential Remote Sense
Adjustable Output Voltage
Short Circuit Protection
17-pin Space-Saving Package
Solderable Copper Case
Description
Ordering Information
The PT6715 series of power modules
are a 13-A rated integrated switching
regulator (ISR), housed in a 17-pin space
saving solderable copper package. These
modules will operate off either a 5V or
3.3V input power bus to provide a highperformance low-voltage power source for
the industry’s latest high-speed, DSPs,
µPs, and bus drivers. This allows for the
easy integration of these new low-voltage
ICs into existing 3.3V or 5V systems without re-designing the central power supply.
The series includes the standard output
bus voltage options, ranging from 1.0V
to 3.3V. Each output voltage option has
a limited adjust range.
Features include a Standby (On/Off)
function, a differential output Remote
Sense, and short circuit protection. The
modules are available in both throughhole and surface mount configurations.
PT6715H
PT6716H
PT6717H
PT6718H
PT6719H
PT6714H
†
†
†
†
=
=
=
=
=
=
Pin-Out Information
Pin
3.3 Volts
2.5 Volts
1.8 Volts
1.5 Volts
1.2Volts
1.0Volts
† 3.3V Input Bus Capable
PT Series Suffix (PT1234 x )
Case/Pin
Configuration
Order
Suffix
Package
Code *
N
A
C
Vertical
Horizontal
SMD
(EMD)
(EMA)
(EMC)
* Previously known as package styles 1340/50.
(Reference the applicable package code drawing
for the dimensions and PC board layout)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Function
Vo Adjust
STBY*
Do Not Connect
Vin
Vin
Vin
Remote Sense Gnd
GND
GND
GND
GND
GND
Vout
Vout
Vout
Vout
Remote Sense Vout
* For further information, see
application notes.
Standard Application
STBY*
Vout Adjust
REMOTE SENSE (+)
2
VIN
L1
4-6
1µH
CIN
+
1
PT6715
8 - 12
17
VOUT
13 - 16
7
COUT
+
LOAD
REMOTE
SENSE (-)
GND
GND
Cin = Required 1000µF electrolytic
Cout= Required 330µF electrolytic
L1 = Optional 1µH input choke
For technical support and more information, see inside back cover or visit www.ti.com
PT6715 Series
13-A 5V/3.3V-Input Adjustable
Integrated Switching Regulator
Specifications
(Unless otherwise stated, Ta =25°C, Vin =5V, Cin =1,000µF, Cout =330µF, and Io =I omax)
PT6715 Series
Typ
Characteristic
Symbol
Conditions
Min
Max
Units
Output Current
Io
Vin
Set Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
Vo tol
Regtemp
Regline
Regload
∆Votot
0.1 (1)
0.1 (1)
4.5
3.1
—
—
—
—
—
—
—
—
±1
±0.5
±5
±5
13
13
5.5
5.5
±1.5 (2)
—
±10
±10
A
Input Voltage Range
Ta =+60°C, 200LFM
Ta =+25°C, natural convection
Over Io Range
—
±2
±3
Efficiency
η
—
—
—
—
—
—
—
—
—
—
300
91
88
85
83
78
75
35
50
±100
20
350
—
—
—
—
—
—
—
—
—
32
400
+2.0
–0.1
—
—
330
1,000
-40 (4)
-40
—
—
–0.5
25
—
—
—
—
Open (3)
+0.4
–
35
15,000
—
+85 (5)
+125
mA
mA
µF
µF
°C
°C
5.4
—
—
106 Hrs
—
500
—
G’s
—
—
—
15 (6)
20 (6)
23
—
—
—
G’s
Vo Ripple (pk-pk)
Transient Response
Over-Current Threshold
Switching Frequency
Remote On/Off (Pin 2)
Input High Voltage
Input Low Voltage
Input Low Current
Vr
ttr
∆Vtr
ITRIP
ƒs
VIH
VIL
IIL
Standby Input Current
External Output Capacitance
External Input Capacitance
Operating Temperature Range
Storage Temperature
Reliability
Iin standby
Cout
Cin
Ta
Ts
MTBF
Mechanical Shock
—
Mechanical Vibration
—
Weight
Flammability
—
—
–40° ≤Ta ≤ +85°C, Io =Iomin
Over Vin range
Over Io range
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
Io =9A
Vo ≥ 2.5V
Vo ≤ 1.8V
Vo =3.3V
Vo =2.5V
Vo =1.8V
Vo =1.5V
Vo =1.2V
Vo =1.0V
20MHz bandwidth
5A/µs load step, 50% to 100% Iomax
Vo over/undershoot
Reset, followed by auto-recovery
Over Vin and Io range
Referenced to –Vin (pin 8)
pins 2 & 8 connected
See application schematic
See application schematic
Over Vin range
—
Per Bellcore TR-332
50% stress, Ta =40°C, ground benign
Per Mil-Std-883D, method 2002.3,
1ms, half-sine, mounted to a fixture
Mil-Std-883D, Method 2007.2,
20-2000Hz, soldered in PCB
Suffix A
Suffix C
VDC
%Vo
%Vo
mV
mV
%Vo
%
mVpp
µs
mV
A
kHz
V
grams
Materials meet UL 94V-0
Notes: (1) The ISR will operate at no load with reduced specifications.
(2) If the remote sense feature is not being used, connect the Remote Sense Gnd (pin 7) to GND (pin 8) for optimum output voltage accuracy.
(3) The STBY* control (pin 2) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit
voltage is typcially 12.6V, and maybe as high as 15V. Consult the related application note for other interface considerations.
(4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors.
(5) See Safe Operating Area curves or contact the factory for the appropriate derating.
(6) The case pins on through-hole package types (suffixes N & A) must be soldered. For more information consult the applicable package outline drawing.
Input/Output Capacitors: The PT6715 series requires a 1,000µF electrolytic (or tantalum) capacitor at the input and 330µF at the output for proper operation in
all applications. In addition, the input capacitance, Cin, must be rated for a minimum of 2Arms of ripple current. For transient or dynamic load applications
additional capacitance may be necessary. For more information consult the related application note on capacitor recommendations.
Input Inductor: An input filter inductor is optioinal for most applications. The inductor must be sized to handle 10ADC with a typical value of 1µH.
For technical support and more information, see inside back cover or visit www.ti.com
Typical Characteristics
PT6715 Series
13-A 5V/3.3V-Input Adjustable
Integrated Switching Regulator
Characteristic Data; Vin =5.0V
Characteristic Data; Vin =3.3V
(See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
100
100
95
95
VOUT
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
85
80
75
90
Efficiency - %
90
Efficiency - %
(See Note A)
VOUT
85
1.8V
1.5V
1.2V
1.0V
80
75
70
70
65
65
60
60
0
2
4
6
8
10
12
0
2
4
Iout (A)
6
8
10
12
Iout (A)
Output Ripple vs Output Current
Output Ripple vs Output Current
60
60
50
50
VOUT
VOUT
Ripple - mV
30
20
40
Ripple - mV
2.5V
3.3V
1.8V
1.5V
1.2V
1.0V
40
1.5V
1.8V
1.2V
1.0V
30
20
10
10
0
0
0
2
4
6
8
10
0
12
2
4
6
8
10
12
Iout (A)
Iout (A)
Power Dissipation vs Output Current
Power Dissipation Output Current
7
7
6
6
V OUT
1.2V
3.3V
2.5V
1.8V
1.0V
1.5V
4
3
2
Pd - Watts
Pd - Watts
VOUT
5
5
1.2V
1.0V
1.8V
1.5V
4
3
2
1
1
0
0
0
2
4
6
8
10
0
12
2
4
6
Safe Operating Area; Vin =5V (See Note B)
10
12
Safe Operating Area; 3.3V (See Note B)
90
90
80
70
Airflow
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
Ambient Temperature (°C)
80
Ambient Temperature (°C)
8
Iout (A)
Iout (A)
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
20
0
2
4
6
8
10
12
Iout (A)
0
2
4
6
8
10
Iout (A)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures
For technical support and more information, see inside back cover or visit www.ti.com
12
Application Notes
PT6705 & PT6715 Series
Using the On/Off Standby Function on the
PT6705/6715 Excalibur™ Series of ISRs
Figure 1-1
The PT6705 and PT6715 regulator series are nonprogrammable (preset voltage) versions of the PT6701,
PT6702, and PT6703 products.
The PT6705/6715 series of products incorporate an on/
off ‘standby’ function, which may be used disable the
regulator output. The standby function is provided by
the STBY* control, pin 2. If pin 2 is left open-circuit the
regulator operates normally, and provides a regulated
output when a valid supply voltage is applied to Vin
(pins 4–6) with respect to GND (pins 8–12). If pin 2 is
connected to ground, the regulator output is disabled
and the input current drawn by the ISR typically drops
to its idle value 1. The standby control may also be used
to hold-off the regulator output during the period that
input power is applied.
Pin 2 is ideally controlled with an open-collector (or
open-drain) discrete transistor (See Figure 1-1 2). The
open-circuit voltage will be approximately 12.0V. Table 1-1
gives the circuit parameters for this control input.
Table 1-1 Standby Control Requirements (3, 4)
Parameter
Min
Typ
Enable (VIH)
Disable (VIL)
Istby (pin 2 =ground)
Vstby (open circuit)
—
–0.2V
Max
Open Circuit
0.4V
–0.5mA
12.0V
15.0V
Notes:
1. When the regulator output is disabled the current drawn
from the +Vin input source is typically reduced to 25mA
for the PT671x series, and to less than 100µA for the
PT670x series.
+12V
(PT6705 Series Only)
2
Stby*
4,5,6
+ V in
17
Sns(+)
PT6705
V IN
GND
8–12
Vo(adj)
1
V OUT
13–16
V out
Sns(-)
7
+
+
C IN
C OUT
Q1
BSS138
STBY
GND
GND
Turn-On Time: In the circuit of Figure 1-1, turning Q1 on
applies a low voltage to pin 2 and disables the regulator
output. Correspondingly, turning Q1 off removes the lowvoltage signal and enables the output 5. Once enabled, the
output will typically experience a 10–15ms delay followed
by a predictable ramp-up of voltage. The regulator provides a fully regulated output within 40ms. The waveforms
of Figure 1-2 show the rise of both the output voltage
and input current for a PT6706 (2.5V). The turn off of
Q1 corresponds to the rise of Vstby. The waveform was
measured with a 5-Vdc input voltage and an 8-ADC load.
Figure 1-2
Vo (1V / DIV)
2. Figure 1-1 is an application schematic for the PT670x
models. This shows the requirement for an external +12V
bias supply. The +12V bias is not required for the PT671x
models. For more details, consult the applicable product
data sheet.
Iin (2A / DIV)
3. The standby control input requires no external pull-up
resistor. The open-circuit voltage of the STBY* pin is
approximately 12.0V.
4. The standby control input is Not compatible with TTL
devices that incorporate a totem-pole output drive. Use
only a true open-collector device, preferably a discrete
bipolar transistor (or MOSFET). To ensure the regulator
output is disabled, the control pin must be pulled to less
than 0.4Vdc with a low-level 0.5mA sink to ground.
3
V Bias
Vstby (10V / DIV)
/DIV
5 After Q1 in Figure 1-1 is turned off and before the
output begins to rise, the regulator output will assert a low
impedance to ground. If an external voltage is applied to
the output it will sink current and possibly over-stress the
part.
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT6705/PT6715 Series
Adjusting the Output Voltage of the PT6705 and
PT6715 Excalibur™ Series of Regulators
4. The PT6705 series requires a 12V external bias voltage in
order to operate (see data sheet). An external bias voltage is
not required for the PT6715 series.
Both the PT6705 and PT6715 series ISRs are nonprogrammable versions of the PT6700 Excalibur™
family of converters. The output voltage of these regulators have a fixed output voltage, which may be adjusted
higher or lower than the factory pre-set voltage using a
single external resistor. Table 2-1 gives the adjustment
range for each model in the series as Va (min) and Va (max).
5. Adjusting the output voltage of the PT6705 and PT6715
(3.3V output) higher than the factory pre-set voltage may
require an increase in the minimum input voltage. These
two models must comply with the following requirements
for Vin(min).
Adjust Up: An increase in the output voltage is obtained by
adding a resistor R2, between pin 1 (Vo Adjust) and pin 7
(Remote Sense GND).
Adjust Down: Add a resistor (R1), between pin 1 (Vo Adjust)
and pin 17 (Remote Sense Vout).
PT6705:
Vin(min)
= (Va + 1)V
PT6715:
Vin(min)
= (Va + 1)V or 4.5V, whichever is greater.
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas.
Refer to Figure 2-1 and Table 2-2 for both the placement and
value of the required resistor, either (R1) or R2 as appropriate.
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the regulator as
possible.
2. Never connect capacitors from Vo Adjust to either GND,
Vout, or the Remote Sense pins. Adding capacitance to the
Vo Adjust pin will affect the stability of the ISR.
3. If the Remote Sense feature is not being used, pin 7 must
be connected to pin 8 for optimum output voltage accuracy.
Correspondingly the resistors (R1) and R2 may be then be
connected from Vo Adjust to either Vout or GND
respectively.
(R1)
=
Ro ( Va –Vr )
V o – Va
R2
=
Ro ·Vr
Va – Vo
Where: Vo
Va
Vr
Ro
Rs
– Rs
Bias
(Req'd for PT6705)
4,5,6
+5V
V in
3
V Bias
17
Sns(+)
PT6705/PT6715
GND
8–12
Vo(adj) Sns(-)
1
7
V out
13–16
Vo
(R1)
Adj Down
+
+
C in
C out
R2
Adjust Up
COM
For technical support and more information, see inside back cover or visit www.ti.com
kΩ
kΩ
= Original output voltage
= Adjusted output voltage
= Reference voltage (Table 2-1)
= Resistance constant (Table 2-1)
= Internal series resistance (Table 2-1)
Figure 2-1
2
Stby*
– Rs
L
O
A
D
COM
Application Notes continued
PT6705/PT6715 Series
Table 2-1
ADJUSTMENT RANGE AND FORMULA PARAMETERS
Series Pt #
12V Bias (4)
No Bias
—
PT6714
—
PT6719
PT6708
PT6718
PT6707
PT6717
PT6706
PT6716
PT6705
PT6715
Vo (nom)
Va (min)
Va (max)
Vr (V)
Ω)
Ro (kΩ
Ω)
Rs (kΩ
1.0
0.94
1.32
0.8
10.0
24.9
1.2
1.09
1.52
0.8
10.0
24.9
1.5
1.47
1.73
1.27
10.2
49.9
1.8
1.75
2.0
1.27
10.0
49.9
2.5
2.25
2.85
1.27
10.0
33.2
3.3
2.75
3.75
1.27
10.0
24.9
Table 2-2
ADJUSTMENT RESISTOR VALUES
Series Pt #
12V Bias (4)
No Bias
Vo (nom)
Va (req’d)
0.950
0.975
1.000
1.025
1.050
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
1.325
1.350
1.375
1.400
1.425
1.450
1.475
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
R1 = (Blue)
—
PT6714
1.0V
—
PT6719
1.2V
PT6708
PT6718
1.5V
PT6707
PT6717
1.8V
(5.1)kΩ
(45.1)kΩ
295.0kΩ
135.0kΩ
81.8kΩ
55.1kΩ
39.1kΩ
28.4kΩ
20.8kΩ
15.1kΩ
10.7kΩ
7.1kΩ
4.2kΩ
1.8kΩ
(5.1)kΩ
(18.4)kΩ
(45.1)kΩ
(125.0)kΩ
295.0kΩ
135.0kΩ
81.8kΩ
55.1kΩ
39.1kΩ
28.4kΩ
20.8kΩ
15.1kΩ
10.7kΩ
7.1kΩ
4.2kΩ
1.8kΩ
(32.1)kΩ
204.0kΩ
77.1kΩ
34.8kΩ
13.6kΩ
(46.1)kΩ
204.0kΩ
77.1kΩ
34.8kΩ
13.6kΩ
Series Pt #
12V Bias (4)
No Bias
Vo (nom)
Va (req’d)
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.8
2.85
2.75
2.80
2.85
2.90
2.95
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
3.70
3.75
PT6706
PT6716
2.5V
PT6705
PT6715
3.3V
(6.0)kΩ
(18.3)kΩ
(38.8)kΩ
(79.8)kΩ
(203.0)kΩ
221.0kΩ
93.8kΩ
51.5kΩ
30.3kΩ
17.6kΩ
9.1kΩ
3.1kΩ
(2.0)kΩ
(5.7)kΩ
(10.2)kΩ
(15.9)kΩ
(23.1)kΩ
(32.8)kΩ
(46.3)kΩ
(66.6)kΩ
(100.0)kΩ
(168.0)kΩ
(371.0)kΩ
( Note 5)
229.0kΩ
102.0kΩ
59.8kΩ
38.6kΩ
25.9kΩ
17.4kΩ
11.4kΩ
6.9kΩ
3.3kΩ
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT6701/PT6702/PT6703,
PT6705 & PT6715 Series
Capacitor Recommendations for the Non-Isolated
13-A Excalibur™ Series of Regulators
Input Capacitors
The recommended input capacitor(s) is determined by
the 2 ampere (rms) minimum ripple current rating and
1,000µF minimum capacitance. Ripple current and
≤100mΩ ESR (Equivalent Series Resistance) values are
the major considerations, along with temperature, when
selecting the proper capacitor. Tantalum capacitors have a
recommended minimum voltage rating of 2× the input
voltage; 10V for +5V operation.
Output Capacitors
The minimum required output capacitance is 330µF
with a maximum ESR ≤100mΩ. Failure to observe this
requirement may lead to regulator instability or oscillation. Electrolytic capacitors have poor ripple performance
at frequencies greater than 400kHz, but excellent low
frequency transient response. Above the ripple frequency
ceramic decoupling capacitors are necessary to improve
the transient response and reduce any high frequency
noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers
are identified in Table 3-1 below.
Table 3-1 Capacitors Characteristic Data
Capacitor Vendor
Series
Tantalum Characteristics
Tantalum capacitors with a minimum 10V rating are
recommended for the input bus, but only the AVX TPS,
Sprague 594/595, or Kemet T495/T510 series. These
types are recommended over many others due to their
higher surge current, power dissipation and ripple current capability. As a caution, the TAJ series by AVX is
not recommended. This series exhibits considerably
higher ESR, reduced power dissipation and lower ripple
current capability. The TAJ Series is also less reliable
compared to the TPS series when determining power
dissipation capability. Tantalum capacitors are highly
recommended in applications where ambient temperatures fall below 0°C.
Capacitor Table
Table 3-1 identifies the characteristics of capacitors from
a number of vendors with acceptable ESR and ripple current (rms) ratings. The suggested minimum quantities per
regulator for both the input and output buses are identified.
This is not an extensive capacitor list. Capacitors from
other vendors are available with comparable specifications.
Those listed are for guidance. The RMS ripple current rating
and ESR (Equivalent Series Resistance at 100kHz) are the critical
parameters to insure both optimum regulator performance
and long capacitor life.
Capacitor Characteristics
Quantity
Working
Voltage
Value(µF)
(ESR) Equivalent
Series Resistance
85°C Maximum
Ripple
Current(Irms)
Physical
Size(mm)
Input
Bus
Output
Bus
Panasonic
FC/FK (Surface Mount)
25V
35V
1000
330
0.038Ω
0.080Ω
2000mA
850mA
18×16.5
10×10.2
1
1
1
EEVFC1E102N
EEVFK1V331P
FC (Radial)
25V
25V
330
1200
0.090Ω
0.038Ω
755mA
2000mA
10×12.5
18×15
1
1
1
EEUFC1E331
EEUFC1E122S
United Chemi-Con
LXV (Radial)
25V
35V
16V
330
1200
2700
0.084Ω
0.028Ω
0.028Ω
825mA
2070mA
2070mA
10×16
16×25
16×25
1
1
1
1
1
LXV25VB331M10X16LL
LXV35VB122M16X25LL
LXV16VB272M16X25LL
FX (Surface Mount)
10V
680
0.015Ω÷2 =0.007Ω
>7000mA
10×10.5
2
1
10FX680M (Os-con)
Nichicon
PL Series
25V
25V
330
2200
0.095Ω
0.028Ω
750mA
2050mA
10×15
18×20
1
1
1
UPL1E331MPH6
UPL1E222MHH6
1
UPM1E331MPH6
Vendor Number
PM Series
25V
330
0.095Ω
750mA
10×15
Os-con:
SS
SVP (Surface Mount)
10V
10V
330
330
0.025Ω÷3 =0.008Ω
0.025Ω÷3 =0.008Ω
>7000mA
>7000mA
10×10.5
10.3×11
3
3
1
1
10SS330M
10SVP330
AVX Tanatalum
TPS Series
(Surface Mount)
10V
10V
330
330
0.100Ω÷3 =0.034Ω
0.060Ω÷3 =0.020Ω
>3500mA
>3500mA
7.0 L
×5.97 W
×3.45 H
3
3
1
1
TPSV337M010R0100
TPSV337M010R0060
7.2 L
×6.0 W
×3.5 H
3
1
594D337X0010R2T
2
1
595D687X0010R2T
7.3 L
×4.3 W
×4.0 H
3
1
T510X337M010AS
5
2
T495X227M010AS
5
2
10TPB220M
Vishay/Sprague Tantalum
595D/594D Series
(Surface Mount)
10V
330
0.045Ω÷3 =0.015Ω
>4600mA
10V
680
0.090Ω÷4 =0.023Ω
>2500mA
Kemet Tantalum
T510/T495 Series
(Surface Mount)
10V
330
0.035Ω÷3 =0.012Ω
>5000mA
10V
220
0.070Ω÷5 =0.035Ω
>3000mA
Sanyo Poscap
TPB (surface Mount)
10V
220
0.040Ω÷5 =0.008Ω
>3000mA
For technical support and more information, see inside back cover or visit www.ti.com
7.2 L
×4.3 W
×3.1 H
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