AP2125
300mA, HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
Description
The AP2125 series are 300mA, positive voltage regulator ICs
fabricated by CMOS process.
Pin Assignments
(Top View)
V
IN
3
ADVANCED INFORMATION
Each of these ICs is equipped with a voltage reference, an error
amplifier, a resistor network for setting output voltage, a chip enable
circuit, a current limit circuit and OTSD (over temperature shut down)
circuit to prevent the IC from over current and over temperature.
The AP2125 series have features of high ripple rejection, low dropout
voltage, low noise, high output voltage accuracy and low current
consumption which make them ideal for use in various battery-
powered apparatus.
The AP2125 have 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.15V and 4.2V fixed
voltage versions.
These ICs are available in tiny SC-70-5 packages as well as industry
standard SOT-23-3 and SOT-23-5 packages.
V
IN
1
2
3
1
GND
SOT-23-3
2
V
OUT
(Top View)
5
V
OUT
Features
GND
Excellent Ripple Rejection: 70dB Typical (1.8V Version)
Low Dropout Voltage: 65mV (I
OUT
=100mA, 3.3V Version)
Low Standby Current: 0.01µA Typical
Low Quiescent Current: 60µA Typical
Extremely Low Noise: 50µVrms Typical
Maximum Output Current: 300mA (Min.)
High Output Voltage Accuracy: ±2%
Compatible with Low ESR Ceramic Capacitor
Excellent Line/Load Regulation
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
CE
4
NC
SOT-23-5/SC-70-5
Applications
CDMA/GSM Cellular Handsets
Battery-powered Equipments
Laptops, Palmtops, Notebook Computers
Hand-held Instruments
PCMCIA Cards
Portable Information Appliances
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP2125
Document number: DS38144 Rev. 2 - 2
1 of 25
www.diodes.com
May 2016
© Diodes Incorporated
AP2125
Functional Block Diagram
3
ADVANCED INFORMATION
1
5
2
SOT-23-3
SOT-23-5/SC-70-5
Absolute Maximum Ratings
(Note 4)
Symbol
V
IN
V
CE
I
OUT
T
J
T
STG
T
LEAD
Input Voltage
Enable Input Voltage
Output Current
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
SOT-23-3
θ
JA
Thermal Resistance
SOT-23-5
SC-70-5
ESD
ESD
Note 4:
Parameter
Value
6.5
-0.3 to V
IN
+0.3
450
+150
-65 to +150
+260
200
200
300
6000
400
Unit
V
V
mA
º
C
º
C
º
C
º
C/W
ESD (Human Body Model)
ESD (Machine Model)
V
V
Stresses greater than 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 Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
V
IN
T
A
Input Voltage
Operating Ambient Temperature Range
Parameter
Min
V
OUT
+0.5V
-40
Max
6
+85
Unit
V
º
C
AP2125
Document number: DS38144 Rev. 2 - 2
3 of 25
www.diodes.com
May 2016
© Diodes Incorporated
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