DIODES AP7167

AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Description
Features
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The AP7167 is a 1.2A, adjustable output voltage, ultra-low
dropout linear regulator. The device includes pass element, error
amplifier, band-gap reference, current limit and thermal shutdown
circuitry. The device is turned on when EN pin is set to logic high
level. A Power-OK (POK) output is available for power
sequence control.
Wide input voltage range: 2.2V – 5.5V
230mV very low dropout at 500mA load
500mV very low dropout at 1A load
Very low quiescent current (IQ): 125µA typical
Adjustable output voltage range: 0.8V to 5.0V
Very fast transient response
High PSRR
Accurate voltage regulation
Current limiting and short circuit protection
Thermal shutdown protection
Stable with any type output capacitor ≥ 4.7µF
Ambient temperature range -40ºC to 85°C
DFN3030-10: Available in “Green” Molding Compound
(no Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
The characteristics of the low dropout voltage and low quiescent
current make it suitable for low to medium power applications, for
example, laptop computers, audio and video applications, and
battery powered devices. The typical quiescent current is
approximately 125µA.
Built-in current-limit and thermal-shutdown functions prevent IC
from damage in fault conditions. The AP7167 is available in
DFN3030-10 package.
Applications
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Servers and laptops
Smart phone and PDA
MP3/MP4
Bluetooth headset
Low and medium power applications
FPGA and DSP core or I/O power
Ordering Information
AP7167 - XX X X
Package
Lead Free
FN : DFN3030-10
Note:
-7 : Tape & Reel
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
AP7167-FN
Note:
G : Green
Packing
Package
Code
FN
Packaging
(Note 2)
DFN3030-10
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP7167 Rev. 2
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© Diodes Incorporated
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Pin Assignment
( Top View )
IN
1
10
OUT
IN
2
9
OUT
POK
3
8
FB
NC
4
7
NC
EN
5
6
GND
DFN3030-10
Pin Descriptions
Name
Pin No.
IN
1, 2
POK
EN
GND
FB
3
5
6
8
OUT
9, 10
NC
4, 7
Description
Voltage input pins, to be tied together externally. Bypass to ground
through at least 1 µF capacitor.
Power-OK output, active-high open-drain
Enable input, active high
Ground
Output feedback
Voltage output pins, to be tied together externally. Bypass to
ground through at least 4.7 µF ceramic capacitor
No connection
Functional Block Diagram
IN
EN
OUT
Gate
Driver
Current Limit
and Thermal
Shutdown
FB
0.8V
POK
0.744V
GND
AP7167 Rev. 2
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© Diodes Incorporated
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Application Circuit
VIN
VOUT
IN
OUT
100kOhm
R1
AP7167
1µF
10µF
FB
POK
R2
Enable
EN
GND
⎛
R ⎞
VOUT = VREF ⎜⎜1 + 1 ⎟⎟
⎝ R2 ⎠
Absolute Maximum Ratings
Symbol
Parameter
ESD HBM
Human Body Model ESD Protection
ESD MM
Machine Model ESD Protection
VIN
Input Voltage
OUT, FB, POK, EN Voltage
Continuous Load Current
Note:
Ratings
Unit
4
300
KV
7
V
VIN + 0.3
V
V
Internal Limited
TJ
Operating Junction Temperature Range
-40 ~ 150
°C
TST
Storage Temperature Range
-65 ~150
°C
PD
Power Dissipation (Note 3,5)
3.1
W
DFN3030-10
3. Ratings apply to ambient temperature at 25°C.
Recommended Operating Conditions
Symbol
VIN
IOUT
TA
AP7167 Rev. 2
Parameter
Input voltage
Output Current
Operating Ambient Temperature
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Min
2.2
0
-40
Max
5.5
1.2
85
Unit
V
A
°C
JANUARY 2008
© Diodes Incorporated
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Electrical Characteristics
o
(TA = 25 C, VIN = VOUT +1V, CIN = 1µF, COUT = 10µF, VEN = VIN, unless otherwise stated)
Symbol
IQ
ISHDN
VDropout
VREF
IFB
VOUT
Parameter
Input Quiescent Current
Input Shutdown Current
Test Conditions
IOUT= 0
VEN = 0V, IOUT = 0 (Note 4)
VOUT ≥ 1.5V, IOUT = 0.5A
VOUT ≥ 1.5V, IOUT = 1A
Dropout Voltage
FB reference voltage
FB leakage
Output Voltage Total Accuracy
ΔVOUT
/ VOUT Line Regulation
ΔVIN
ΔVOUT / VOUT
tST
PSRR
Power Supply Rejection Ratio
ILIMIT
ISHORT
VIL
VIH
IEN
VOL
Current limit
Short-circuit Current
EN Input Logic Low Voltage
EN Input Logic High Voltage
EN Input leakage
POK output low voltage
Output voltage (rising) POK
threshold
Output voltage POK hysteresis
VPOK_Hys
POK deglitch
POK leakage current
IPOK_LK
Thermal shutdown threshold
TSHDN
Thermal shutdown hysteresis
THYS
Thermal Resistance
θJA
Junction-to-Ambient
Note:
⎯
-3
VIN = VOUT +1V to 5.5V,
IOUT = 1mA
Load Regulation
Start-up Time, from EN high to
POK high
VPOK_TH_UP
Min
⎯
-1
IOUT from 1mA to 1A
VEN = 0V to 2.0V, IOUT =
100mA, VIN = 3.3V
1kHz, VIN = 3.3V, VOUT =
1.2V, IOUT = 100mA
VOUT = 1.8V, ROUT = 0.5Ω
VIN = 3.3V, VOUT < 0.2V
Typ.
125
0.1
230
500
0.8
0.01
Max
180
1
800
1
3
0.02
-1.5
1.2
Unit
µA
µA
mV
mV
V
µA
%
%/V
1.5
%
190
µs
60
dB
1.6
750
0.01
100
1
200
A
mA
V
V
µA
mV
87%
92%
97%
Vref
⎯
4%
160
0.01
155
25
1
Vref
µs
µA
°C
°C
0.4
VEN = 0V or 5.5V
Sink 2mA
FB (or OUT for fixed
version) rising
VIN = 3.3V, VOUT = 1.2V
VPOK = 5.5V
DFN3030-10 (Note 5)
1.4
⎯
40
o
C/W
4. POK pin must be disconnected from IN pin.
5. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to
bottom layer 1.0”x1.5” ground plane.
AP7167 Rev. 2
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics
Output Voltage vs. Temperature
Output Voltage vs. Temperature
3.40
1.30
VOUT = 1.2V
Output Voltage (V)
Output Voltage (V)
VOUT = 3.3V
3.35
3.30
3.25
1.25
1.20
1.15
1.10
3.20
-50
-50
-25
0
25
50
75
100
-25
0
Quiescent Current vs. Input Voltage
100
125
Quiescent Current vs. IOUT
VOUT=1.8V
VOUT=3.3V
155
140
125
110
95
Iout=0mA
Iout=500mA
Quiescent Current ( μ A)
Quiescent Current (μA)
75
Temperature ( C)
0
80
170
160
150
140
130
120
110
VIN=2.5V
VIN=3.3V
100
4.0
4.3
4.6
4.9
5.2
5.5
0.0
0.2
0.4
0.6
Input Voltage (V)
1.2
0.810
140
125
110
VIN=2.2V, Vout=1.0V
95
VIN=3.3V, Vout=1.8V
VIN=5.0V, Vout=3.3V
-25.0
0.0
25.0
50.0
75.0
100.0
Reference Voltage (V)
155
125.0
0.805
0.800
0.795
Vin=2.2V
Vin=3.3V
Vin=5.5V
0.790
-50
Temperature (0C)
AP7167 Rev. 2
1.0
Reference Voltage vs. Temperature
170
80
-50.0
0.8
IOUT (A)
Quiescent Current vs. Temperature
Quiescent Current (μA)
50
0
Temperature ( C)
170
25
125
-25
0
25
50
75
100
125
Temperature (0C)
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics
(Continued)
Line Regulation
Load Regulation
VOUT=1.8V, IOUT=1mA
VIN=2.2V, VOUT=1.2V,
0.10
0.5
Change in VOUT (%)
Change in VOUT (%/V)
25°C
0.4
0.05
0.00
25°C
-0.05
85°C
-40°C
85°C
0.3
-40°C
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.10
3.0
3.5
4.0
4.5
5.0
5.5
-0.5
0.0
VIN (V)
0.8
1.2
IOUT (A)
Short Circuit Current vs. Input Voltage
Short Circuit Current vs. Temperature
VOUT=1.2V
VOUT=1.2V
0.77
0.80
Short Circuit Current (A)
Short Circuit Current (A)
0.4
0.76
0.75
0.74
0.73
0.72
0.71
0.70
0.75
0.70
0.65
0.69
2.2
2.4
2.6
2.8
3
3.2
0.60
3.4
-50
Input Voltage (V)
-25
0
25
50
75
o
Temperature ( C)
PSRR
Dropout Voltage vs. IOUT
VOUT=3.3V
600
PSRR (dB)
Dropout Voltage (mV)
700
500
400
300
200
25°C
100
85°C
-40°C
0
0
0.2
0.4
0.6
0.8
1
1.2
-40
-45
-50
-55
-60
-65
-70
-75
-80
100
1000
10000
Frequency (Hz)
100000
IOUT(A)
AP7167 Rev. 2
6 of 11
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics
(Continued)
Line Transient Response
Line Transient Response
VIN =3V to 5.5V
COUT =10uF (Ceramic)
IOUT =200mA
VIN =5.5V to 3V
COUT =10uF (Ceramic)
IOUT =200mA
VIN
2V/div
VIN
2V/div
VOUT
50mV/div
VOUT
50mV/div
Time (5ms/div)
Time (500us/div)
Output Load Transient Response (VOUT=1.8V)
Output Load Transient Response (VOUT=3.3V)
COUT=470uF (electrolytic)
VOUT
COUT=10uF (Ceramic)
100mV/div
COUT=470uF (electrolytic)
COUT=10uF (Ceramic)
VOUT
100mV/div
COUT=1uF (Ceramic)
COUT=1uF (Ceramic)
1.2A
1.2A
IOUT
IOUT
1A/us
500mA/div
1A/us
500mA/div
50mA
50mA
Time (100us/div)
Time (100us/div)
Start-up Time (VOUT=1.2V, IOUT=0.1A)
Start-up Time (VOUT=1.2V, IOUT=1.2A)
VEN
2V/div
VEN
2V/div
COUT=10uF (Ceramic)
COUT=10uF (Ceramic)
VOUT
1V/div
VOUT
1V/div
VPOK
2V/div
VPOK
2V/div
Time (50us/div)
AP7167 Rev. 2
Time (50us/div)
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics
(Continued)
Current Limit vs. Temperature
Current Limit (A)
1.8
1.7
1.6
1.5
VIN =2.8V,Vout=1.8V
VIN =3.3V,Vout=1.8V
1.4
-50
-25
0
25
50
75
100
o
Temperature ( C)
Application Note
VIN
Input Capacitor
A 1μF ceramic capacitor is recommended to connect
between IN and GND pins to decouple input power
supply glitch and noise. The amount of the capacitance
may be increased without limit. A lower ESR (Equivalent
Series Resistance) capacitor allows the use of less
capacitance, while higher ESR type requires more
capacitance. This input capacitor should be located as
close as possible to the device to assure input stability
and less noise. For PCB layout, a wide copper trace is
required for both IN and GND.
Output Capacitor
The output capacitor is required to stabilize and help the
transient response of the LDO. The AP7167 is designed
to have excellent transient response for most
applications with a small amount of output capacitance.
The AP7167 is stable for all available types and values
of output capacitors ≥ 4.7μF. The device is also stable
with multiple capacitors in parallel, which can be of any
type of value. Additional capacitance helps to reduce
undershoot and overshoot during transient. This
capacitor should be placed as close as possible to OUT
and GND pins for optimum performance.
Adjustable Operation
The AP7167 provides output voltage from 0.8V to 5.0V
through external resistor divider as shown below.
AP7167 Rev. 2
VOUT
IN
CIN
100kOhm
OUT
R1
AP7167
POK
COUT
FB
R2
Enable
EN
GND
The output voltage is calculated by:
⎛
R ⎞
VOUT = VREF ⎜⎜1 + 1 ⎟⎟
⎝ R2 ⎠
Where VREF=0.8V (the internal reference voltage)
Rearranging the equation will give the following
equation to find the approximate resistor divider values:
⎛V
⎞
R1 = R2 ⎜⎜ OUT − 1⎟⎟
⎝ VREF
⎠
To maintain the stability of the internal reference voltage,
R2 needs to be kept smaller than 250kΩ.
8 of 11
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Application Note
(Continued)
No Load Stability
Other than external resistor divider, no minimum load is
required to keep the device stable. The device will
remain stable and regulated in no load condition.
Wide Output Range
The AP7167, with a wide output range of 0.8V to 5.0V,
provides a versatile solution for many portable and low
power applications.
ENABLE/SHUTDOWN Operation
The AP7167 is turned on by setting the EN pin high, and
is turned off by pulling it low. If this feature is not used,
the EN pin should be tied to IN pin to keep the regulator
output on at all time. To ensure proper operation, the
signal source used to drive the EN pin must be able to
swing above and below the specified turn-on/off voltage
thresholds listed in the Electrical Characteristics section
under VIL and VIH.
Thermal Shutdown Protection
Thermal protection disables the output when the
junction temperature rises to approximately +155°C,
allowing the device to cool down. When the junction
temperature reduces to approximately +130°C the
output circuitry is enabled again. Depending on power
dissipation,
thermal
resistance,
and
ambient
temperature, the thermal protection circuit may cycle on
and off. This cycling limits the heat dissipation of the
regulator, protecting it from damage due to overheating.
POWER-OK
The Power-Ok (POK) pin is an active high open-drain
output. It can be connected to any 5.5V or lower rail
through an external pull-up resistor.
The
recommended sink current of POK pin is up to 4mA, so
the pull-up resistor for POK should be in the range of
10kΩ to 1MΩ. If output voltage monitoring is not needed,
the POK pin can be left floating.
Current Limit Protection
When output current at OUT pin is higher than current
limit threshold, the current limit protection will be
triggered and clamp the output current to approximately
1.6A (1.2A min) to prevent over-current and to protect
the regulator from damage due to overheating.
Short Circuit Protection
When OUT pin is short-circuited to GND or OUT
voltage is less than 200mV, short circuit protection
be triggered and clamp the output current
approximately 750mA. This feature protects
regulator from over-current and damage due
overheating.
pin
will
to
the
to
Power Dissipation
The device power dissipation and proper sizing of the
thermal plane that is connected to the thermal pad is
critical to avoid thermal shutdown and ensuring reliable
operation. Power dissipation of the device depends on
input voltage and load conditions and can be calculated
by:
PD = ( VIN − VOUT )xIOUT
The AP7167 is available in the DFN3030-10 package
with exposed pad, which is the primary conduction path
for heat to the printed circuit board (PCB). The pad can
be connected to ground or be left floating; however, to
ensure the device will not overheat, it should be
attached to an appropriate amount of copper PCB area.
However, the maximum power dissipation that can be
handled by the device depends on the maximum
junction to ambient thermal resistance, maximum
ambient temperature, and maximum device junction
temperature, which can be approximated by the
equation below:
Low Quiescent Current
The AP7167, consuming only around 150µA for all input
range and output loading, provides great power saving
in portable and low power applications.
AP7167 Rev. 2
9 of 11
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PD ([email protected] TA ) =
( +150°C − TA )
R θJA
JANUARY 2008
© Diodes Incorporated
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Marking Information
(1) DFN3030-10
( Top View )
XX : B4 : AP7167
Y : Year 0~9
M : Month A~L
X : G : Green
XX
YMX
Part Number
AP7167
Package Information
Package
DFN3030-10
Identification Code
B4
(All Dimensions in mm)
(1) DFN3030-10
0.15Typ.
Seating Plane
Side View
2X-
0.25 A
0.08 C
0/0.05
0.10 C
0.57/0.60
TOP MARK
C
2.9/3.1
2.3/2.5
B
A
R0
.30
0
0.25/0.55
1.5/1.7
2.9/3.1
(Pin #1 ID)
2X-
0.25 B
0.375Typ.
0.50Typ.
0.2/0.3
0.10
C A B
Bottom View
Note:
6. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
7. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
AP7167 Rev. 2
10 of 11
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP7167 Rev. 2
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