Data Sheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2120
General Description Features
The AP2120 series are positive voltage regulator ICs
Low Dropout Voltage at I =100mA: 200mV
OUT
fabricated by CMOS process. Each of these ICs con-
Typical (Except 1.2V, 1.3V and 1.5V Versions)
sists of a voltage reference, an error amplifier, a resis-
Low Quiescent Current: 25A Typical
tor network for setting output voltage, a current limit
High Ripple Rejection: 65dB Typicalf=1kHz
circuit for current protection.
Output Current: More Than 150mA (250mA
Limit)
The AP2120 series feature high supply voltage ripple
Extremely Low Noise: 15Vrms@V =1.2V,
OUT
rejection, low dropout voltage, low noise, high output
1.3V, 1.5V (10Hz to 100kHz)
voltage accuracy, and low current consumption which
make them ideal for use in various battery-powered Excellent Line Regulation: 4mV Typical
devices.
Excellent Load Regulation: 12mV Typical
High Output Voltage Accuracy: 2%
The AP2120 series have 1.2V, 1.3V, 1.5V, 1.8V, 2.5V,
Excellent Line Transient Response and Load
2.8V, 3.0V, 3.2V, 3.3V, 3.6V, 4.0V and 5.0V versions.
Transient Response
Compatible with Low ESR Ceramic Capacitor (as
The AP2120 are available in standard SOT-23, SOT-89
Low as 1F)
and TO-92 packages.
Applications
Mobile Phones, Cordless Phones
Wireless Communication Equipment
Portable Games
Cameras, Video Recorders
Sub-board Power Supplies for Telecom Equip-
ment
Battery Powered Equipment
SOT-23
SOT-89 TO-92 (Bulk Packing) TO-92 (Ammo Packing)
Figure 1. Package Types of AP2120
Mar. 2013 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
1 Data Sheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2120
Pin Configuration
N/NA Package R Package
(SOT-23) (SOT-89)
N NA
V
GND
IN
3
3
2
1 123
1 2
V
V
GND V IN GND V V
OUT
OUT IN
OUT
Z Package Z Package
(TO-92 (Bulk Packing)) (TO-92 (Ammo Packing))
V
3
OUT
V
3
OUT
V
V 2
2 IN
IN
GND
1
1 GND
Figure 2. Pin Configuration of AP2120 (Top View)
Pin Description
Pin Number
Pin Name Function
SOT-23 (N) SOT-23 (NA) SOT-89/
TO-92
1 3 1 GND Ground
22 3 V Regulated Output Voltage
OUT
31 2 V Input Voltage
IN
Mar. 2013 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
2