Page 1
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Description
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.
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 are available in DFN3030-10 and SOP-8L
packages.
Features
Pin Assignments
IN
IN
POK
NC
EN
IN
IN
( Top View )
1
2
3
4
5
DFN3030-10
( Top View )
1
2
10
OUT
9
OUT
8
FB
7
NC
6
GND
8
7
OUT
OUT
• Wide input voltage range: 2.2V – 5.5V
• 230mV very low dropout at 500mA load
• 500mV very low dropout at 1A load
• 3% total accuracy over line, load and temperature
• 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 ºC
• DFN3030-10 and SOP-8L-EP: Available in “Green”
Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
POK
EN
Applications
• Servers and laptops
• Smart phone and PDA
• MP3/MP4
• Bluetooth headset
• Low and medium power applications
• FPGA and DSP core or I/O power
3
4
SOP-8L-EP
6
5
FB
GND
AP7167
Document number: DS31252 Rev. 7 - 2
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© Diodes Incorporated
Page 2
Typical Application Circuit
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
V
IN
1µF
100kOhm
Enable
IN
AP7167
POK
EN
OUT
FB
GND
R
1
R
2
V
OUT
V
REF
⎛
⎜
1
⎜
⎝
⎞
R
1
⎟
+=
⎟
R
2
⎠
Pin Descriptions
Pin Name
IN 1, 2 1, 2
POK 3 3 Power-OK output, active-high open-drain.
EN 5 4 Enable input, active high.
GND 6 5 Ground.
FB 8 6 Output feedback.
OUT 9, 10 7, 8
NC 4, 7 NA No connection.
DFN3030-10 SOP-8L-EP
Pin #
Description
Voltage input pins, to be tied together externally. Bypass to ground
through at least 1µF capacitor.
Voltage output pins, to be tied together extern ally. Bypass to ground
through at least 4.7µF ceramic capacitor.
V
OUT
10µF
AP7167
Document number: DS31252 Rev. 7 - 2
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Page 3
Functional Block Diagram
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
IN
EN
POK
Gate
Driver
Current Limit
and Thermal
Shutdown
0.8V
0.744V
OUT
FB
GND
Absolute Maximum Ratings
Symbol Parameter Ratings Unit
ESD HBM Human Body Model ESD Protection 4 KV
ESD MM Machine Model ESD Protection 300 V
VIN Input Voltage 7 V
OUT, FB, POK, EN Voltage VIN + 0.3 V
Continuous Load Current Internal Limited
TJ Operating Junction Temperature Range -40 ~ 150 °C
TST Storage Temperature Range -65 ~150 °C
PD Power Dissipation
Notes: 2. Ratings apply to ambient temperature at 25°C
DFN3030-10 (Note 2, 4) 3.1 W
SOP-8L-EP (Note 2, 5) 4.0 W
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
I
OUT
T
IN
A
Input voltage 2.2 5.5 V
Output Current 0 1.2 A
Operating Ambient Temperature -40 85
AP7167
Document number: DS31252 Rev. 7 - 2
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September 2010
© Diodes Incorporated
°C
Page 4
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Electrical Characteristics
(TA = 25oC, V
Symbol Parameter Test Conditions Min Typ. Max Unit
I
Q
I
SHDN
V
Dropout
V
REF
I
FB
V
OUT
ΔV
OUT
ΔV
IN
ΔV
/ V
OUT
tST
PSRR
I
LIMIT
I
SHORT
V
V
I
EN
VOL
V
POK_TH_UP
V
POK_Hys
POK deglitch
I
POK_LK
T
SHDN
T
HYS
θ
JA
Notes: 3. POK pin must be disconnected from IN pin.
4. 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.
5. Test condition for SOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and
thermal vias to bottom layer ground plane.
= V
OUT
+1V, C
IN
Input Quiescent Current I
Input Shutdown Current VEN = 0V, I
Dropout Voltage
FB reference voltage 0.8 V
FB leakage
Output Voltage Total Accuracy
Line Regulation
OUT
V
/
Load Regulation I
OUT
Start-up Time, from EN high to POK
high
Power Supply Rejection Ratio
Current limit
Short-circuit Current V
IL
IH
EN Input Logic Low Voltage 0.4 V
EN Input Logic High Voltage 1.4 V
EN Input leakage V
= 1µF, C
IN
= 10µF, V
OUT
= VIN, unless otherwise stated)
EN
V
V
OUT
OUT
OUT
= 0
≥ 1.5V, I
≥ 1.5V, I
= 0 (Note 3) -1 0.1 1 µA
OUT
= 0.5A
OUT
= 1A
OUT
⎯
⎯
Over line, load and
temperature
V
= V
IN
I
OUT
OUT
V
EN
100mA, V
1kHz, V
I
OUT
V
OUT
IN
EN
+1V to 5.5V,
OUT
= 1mA
from 1mA to 1A -1.5 1.5 %
= 0V to 2.0V, I
= 3.3V
IN
= 3.3V, V
IN
OUT
OUT
=
= 1.2V,
= 100mA
= 1.8V, R
= 3.3V, V
= 0.5Ω
OUT
< 0.2V 750 mA
OUT
= 0V or 5.5V
-3 3 %
1.2 1.6 A
⎯
125 180 µA
230 mV
500 800 mV
0.01 1 µA
0.02 %/V
190 µs
60 dB
0.01 1 µA
POK output low voltage Force 2mA 100 200 mV
Output voltage (rising) POK threshold
Output voltage POK hysteresis 4% V
V
POK leakage current V
Thermal shutdown threshold 155
Thermal shutdown hysteresis 25
Thermal Resistance Junction-toAmbient
FB (or OUT for fixed version)
rising
= 3.3V, V
IN
= 5.5V
POK
= 1.2 V 160 µs
OUT
87% 92% 97% V
⎯
0.01 1 µA
DFN3030-10 (Note 4) 40
SOP-8L-EP (Note 5) 27
°C
°C
o
C/W
o
C/W
ref
ref
Typical Performance Characteristics
AP7167
Document number: DS31252 Rev. 7 - 2
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© Diodes Incorporated
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Output Voltage vs. Temperature
3.40
3.35
3.30
3.25
Output Voltage (V)
3.20
VOUT = 3.3V
-50 -25 0 25 50 75 100 125
Temperature (0C)
Quiescent Current vs. Input Voltage
=3.3V
V
OUT
170
A)
155
μ
140
125
110
95
Quiescent Current (
80
4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Iout=0mA
Iout=500mA
Output Voltage vs. Temperature
1.30
1.25
1.20
1.15
VOUT = 1.2V
Output Voltage (V)
1.10
-50-250 255075100125
Temperature (0C)
Qui escent C urrent vs. I
V
=1.8V
170
A)
160
μ
150
140
130
120
110
Quiescent Current (
100
OUT
0.0 0.2 0.4 0. 6 0.8 1.0 1. 2
I
(A)
OUT
OUT
VIN=2.5V
VIN=3.3V
Qui escent C urrent vs. Temperature
170
A)
π
155
140
125
110
95
Quiescent Current (
80
-50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0
VIN=2.2V, Vout=1.0V
VIN=3.3V, Vout=1.8V
VIN=5.0V, Vout=3.3V
Temperature (0C)
Typical Performance Characteristics (Continued)
AP7167
Document number: DS31252 Rev. 7 - 2
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Reference Voltage vs. Temperature
0.810
0.805
0.800
0.795
Reference Voltage (V)
0.790
-50-250 255075100125
Temperature (0C)
Vin=2.2V
Vin=3.3V
Vin=5.5V
September 2010
© Diodes Incorporated
Page 6
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Line Regulation
V
0.10
0.05
OUT
=1.8V, I
OUT
=1mA
(%/V)
OUT
0.00
-0.0 5
Change in V
-0.1 0
3 .0 3. 5 4.0 4.5 5.0 5.5
VIN (V)
Short Circuit Current vs. Input Voltage
=1.2V
V
OUT
0.77
0.76
0.75
0.74
0.73
0.72
0.71
0.70
Short Circuit Current (A)
0.69
2.2 2.4 2.6 2.8 3 3.2 3.4
Input Voltage (V)
25°C
85°C
-40°C
Load Regulation
V
=2.2V, V
IN
0.5
0.4
0.3
(%)
0.2
OUT
0.1
0.0
-0.1
-0.2
-0.3
Change in V
-0.4
-0.5
0.0 0.4 0.8 1.2
25°C
85°C
-40°C
OUT
=1.2V,
I
OUT
(A)
Short Circuit Current vs. Temperature
V
=1.2V
OUT
0.80
0.75
0.70
0.65
Short Circuit Current (A)
0.60
-50 -25 0 25 50 75
Temperature (oC)
Dropout Voltage vs. I
=3.3V
V
OUT
700
600
500
400
300
200
100
Dropout Voltage (mV)
0
0 0.2 0.4 0.6 0.8 1 1.2
AP7167
Document number: DS31252 Rev. 7 - 2
I
OUT
(A)
OUT
25°C
85°C
-40°C
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PSRR
-40
-45
-50
-55
-60
-65
PS RR (dB)
-70
-75
-80
100 1000 10000 100000
Frequency (Hz)
September 2010
© Diodes Incorporated
Page 7
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics (Continued)
Line Transient Response
V
=3V to 5.5V
IN
C
=10uF
OUT
(Ceramic)
I
=200mA
OUT
Line Transient Response
V
=5.5V to 3V
IN
C
=10uF
OUT
(Ceramic)
I
=200mA
OUT
AP7167
VIN
2V/div
V
OUT
50mV/div
Time (5ms/div)
Output Load Transient Response (V
V
OUT
100mV/div
1.2A
I
OUT
500mA/div
50mA
Time (100us/div)
=1.8V)
OUT
C
=470uF (electrolytic)
OUT
C
=10uF (Ceramic)
OUT
C
=1uF (Ceramic)
OUT
1A/us
VIN
2V/div
V
OUT
50mV/div
Time (500us/div)
Output Load Transient Response (V
V
OUT
100mV/div
1.2A
I
OUT
500mA/div
50mA
Time (100us/div)
=3.3V)
OUT
C
=470uF (electrolytic)
OUT
C
=10uF (Ceramic)
OUT
C
=1uF (Ceramic)
OUT
1A/us
Start-up Time (V
VEN
2V/div
V
OUT
1V/div
V
POK
2V/div
C
OUT
OUT
Time (50us/div)
AP7167
Document number: DS31252 Rev. 7 - 2
=1.2V, I
=10uF
OUT
=0.1A)
Start-up Time (V
VEN
2V/div
V
OUT
1V/div
V
POK
2V/div
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=1.2V, I
OUT
C
=10uF
OUT
Time (50us/div)
OUT
=1.2A)
September 2010
© Diodes Incorporated
Page 8
1.2A LOW DROPOUT REGULATOR WITH POK
Typical Performance Characteristics (Continued)
Current Limit vs. Temperature
1.8
1.7
1.6
1.5
Current Limit (A)
1.4
-50 -25 0 25 50 75 100
Temperature (oC)
VIN =2.8V,Vout=1.8V
VIN =3.3V,Vout=1.8V
AP7167
AP7167
Document number: DS31252 Rev. 7 - 2
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Page 9
Application Notes
Input Capacitor
A 1μF ceramic capacitor is recommended to connect
between IN and GND pins to decouple input po wer supply
glitch and noise. The amount of the capacitance may b e
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 th e
transient response of the LDO. The AP716 7 is designe d to
have excellent transient response for most applications
with a small amount of output capacitance. T he AP7167 is
stable for all available types and values of output
capacitors
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.
The output voltage is calculated by:
Where V
≥ 4.7μF. The device is also stable with multiple
V
IN
C
IN
=0.8V (the internal reference voltage)
REF
100kOhm
Enable
V
IN
POK
EN
OUT
AP7167
V
REF
OUT
GND
FB
⎛
⎜
⎜
⎝
R
1
R
2
⎞
R
1
⎟
+=
1
⎟
R
2
⎠
V
OUT
C
OUT
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Rearranging the equation will give the fol lowing equation
to find the approximate resistor divider values :
⎛
V
OUT
⎜
R
R
2
1
⎜
V
REF
⎝
To maintain the stability of the inter nal reference voltage,
R
needs to be kept smaller than 250kΩ.
2
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.
ENABLE/SHUTDOWN Operation
The AP7167 is turned on by setting the EN pin high, an d i s
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 V
and VIH.
IL
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 pin
voltage is less than 200mV, short circuit protection will be
triggered and clamp the output current to approximately
750mA. This feature protects the regulator from overcurrent and damage due to overheating.
−= 1
⎞
⎟
⎟
⎠
AP7167
Document number: DS31252 Rev. 7 - 2
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Page 10
−
=
+
Application Notes (Continued)
Low Quiescent Current
The AP7167, consuming only around 150µA for all input
range and output loading, provides great power savin g in
portable and low power applications.
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.
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.
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
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:
xI)VV(P
OUTOUTIND
The AP7167 is available in the DFN3030-10 and SOP-8LEP packages, both with exposed pad, which is the primar y
conduction path for heat to the printed circui t board (PCB).
The pad can be connected to ground or be left floating;
however, to ensure the device will not over heat, 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 juncti on
to ambient thermal resistance, maximum ambient
temperature, and maximum device junction temperature,
which can be approximated by the equation below:
−°
)TC150(
)T(max@P
=
AD
R
A
JA
θ
AP7167
Document number: DS31252 Rev. 7 - 2
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© Diodes Incorporated
Page 11
Ordering Information
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
AP7167 - XX G - X
Package Green
FN : DFN3030-10
SP : SOP-8L-EP
Device
AP7167-FNG-7 FN DFN3030-10 3000/Tape & Reel -7
AP7167-SPG-13 SP SOP-8L-EP 2500/Tape & Reel -13
Notes: 6. 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.
Package
Code
Packaging
(Note 6)
G : Green
7”/13” Tape and Reel
Quantity Part Number Suffix
Packing
7/13 : Tape & Reel
Marking Information
(1) DFN3030-10
( Top View )
XX : Identification Code
: Year : 0~9
XX
W X
Y
Y
W
: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X
: A~Z : Green
Part Number Package Identification Code
AP7167 DFN3030-10 B4
(2) SOP-8L-EP
Logo
Part No.
AP7167
Document number: DS31252 Rev. 7 - 2
( Top View )
8
5
AP7167
YY
WW X
X
41
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E
G : Green
YY
: Year : 08, 09,10~
WW
: Week : 01~52; 52
represents 52 and 53 week
X
: Internal Code
SOP-8L-EP
© Diodes Incorporated
September 2010
Page 12
Package Outline Dimensions (Continued)
(1) Package Type: DFN3030-10
TOP MARK
0.10 C
0.08 C
A
Side View
0.25
0/0.02
0.57/0.63
2X-
B
2.9/3.1
2.3/2.5
C
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
0.15
Seating Plane
A
10x-0.30
Top View
0.50Typ.
0.600.15
(Pin #1 ID)
2.9/3.1
1.5/1.7
2X-
0.25
B
0.375Typ.
0.50Typ.
Bottom View
(2) Package Type: SOP-8L-EP
3.85/3.95
1
7°~9°
1.30/1.50
1.27typ
1
8x-0.60
0.3/0.5
4.85/4.95
R0
.
3
0
Detail "A"
7°~9°
45°
5.90/6.10
0.15/0.25
1.75max.
0/0.13
Exposed pad
0.35max.
Detail "A"
3.70/4.10
0.62/0.82
0.25/0.55
0.20/0.30
Bottom View
0.254
Gauge Plane
Seating Plane
0.10 CAB
3.3Ref.
1.80
2.60
Land Pattern Recommendation
(Unit:mm)
Exposed pad
2.4Ref.
1
0.15
5.4
6x-1.27
8x-1.55
Land Pattem Recommendation
Notes: 7. All dimensions are in millimeters. Angles are in degrees.
(Unit:mm)
8. Coplanarity applies to the exposed heat sink slug as well as th e terminals.
AP7167
Document number: DS31252 Rev. 7 - 2
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© Diodes Incorporated
Page 13
Taping Orientation (Note 9)
For DFN3030-10
AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
Notes: 9.The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP7167
Document number: DS31252 Rev. 7 - 2
www.diodes.com
13 of 14
September 2010
© Diodes Incorporated
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AP7167
1.2A LOW DROPOUT REGULATOR WITH POK
IMPORTANT NOTICE
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can b e reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2010, Diodes Incorporated
www.diodes.com
AP7167
Document number: DS31252 Rev. 7 - 2
14 of 14
www.diodes.com
September 2010
© Diodes Incorporated
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