
AP7168
1.2A LOW DROPOUT REGULATOR WITH POK
AP7168
Document number: DS32019 Rev. 2 - 2
1 of 11
September 2010 Diodes Incorporated
N
Description
The AP7168 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 AP7168 is available
in SO-8EP package.
Features
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 (I
Q
): 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
SO-8EP: 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
.
Pin Assignments
NC
NC
EN
IN
FB
GND
OUT
( Top View )
1
2
3
4
8
7
6
5
POK
SO-8EP
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
Typical Application Circuit
1
μ
F
IN
GND
EN
OUT
Enable
FB
10
μ
F
V
IN
V
OUT
POK
100kOhm
R
1
R
2
AP7168
+
=
2
1
REF
V
OUT
V
R
R
1