Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2125
General Description
The AP2125 series are 300mA, positive voltage regu-
lator ICs fabricated by CMOS process.
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 rejec-
tion, low dropout voltage, low noise, high output volt-
age 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 and SC-82
packages as well as industry standard SOT-23-3 and
SOT-23-5 packages.
Features
·
·
·
·
·
·
·
·
·
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
Applications
·
·
·
·
·
·
CDMA/GSM Cellular Handsets
Battery-powered Equipments
Laptops, Palmtops, Notebook Computers
Hand-held Instruments
PCMCIA Cards
Portable Information Appliances
SOT-23-3
SOT-23-5
SC-70-5
SC-82
Figure 1. Package Types of AP2125
May. 2010 Rev. 1. 4
1
BCD Semiconductor Manufacturing Limited
Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2125
Pin Configuration
N Package
(SOT-23-3)
V
IN
3
K/KS Package
(SOT-23-5/SC-70-5)
KC Package
(SC-82)
V
IN
GND
1
GND
2
V
OUT
1
2
3
5
V
OUT
CE
1
4
V
IN
CE
4
NC
GND
2
3
V
OUT
Figure 2. Pin Configuration of AP2125 (Top View)
Pin Description
Pin Number
Pin Name
SOT-23-3
3
1
SOT-23-5/
SC-70-5
1
2
3
4
2
5
3
SC-82
4
2
1
V
IN
GND
CE
NC
V
OUT
Input voltage
Ground
Active high enable input pin. Logic high=enable, logic low=shutdown
No connection
Regulated output voltage
Function
May. 2010 Rev. 1. 4
2
BCD Semiconductor Manufacturing Limited
Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2125
Functional Block Diagram
Shutdown
and
Logic Control
V
REF
MOS Driver
3
V
IN
CE
3 (1)
Shutdown
and
Logic Control
1 (4)
V
IN
V
REF
MOS Driver
2
Current Limit
and
Thermal Protection
V
OUT
5 (3)
Current Limit
and
Thermal
Protection
V
OUT
1
GND
2 (2)
GND
SOT-23-3
A(B)
A SOT-23-5/SC-70-5
B
SC-82
Figure 3. Functional Block Diagram of AP2125
May. 2010 Rev. 1. 4
3
BCD Semiconductor Manufacturing Limited
Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2125
Ordering Information
AP2125
Circuit Type
-
E1: Lead Free
G1: Green
TR: Tape and Reel
Package
N:
SOT-23-3
K:
SOT-23-5
KS: SC-70-5
KC: SC-82
1.8: Fixed Output 1.8V
2.5: Fixed Output 2.5V
2.8: Fixed Output 2.8V
3.0: Fixed Output 3.0V
3.3: Fixed Output 3.3V
4.15: Fixed Output 4.15V
4.2: Fixed Output 4.2V
Part Number
Lead Free
AP2125N-1.8TRE1
AP2125N-2.5TRE1
SOT-23-3
-40 to 85
o
C
AP2125N-2.8TRE1
AP2125N-3.0TRE1
AP2125N-3.3TRE1
AP2125N-4.2TRE1
AP2125K-1.8TRE1
AP2125K-2.5TRE1
AP2125K-2.8TRE1
SOT-23-5
-40 to 85
o
C
AP2125K-3.0TRE1
AP2125K-3.3TRE1
AP2125K-4.2TRE1
AP2125KS-1.8TRE1
AP2125KS-2.5TRE1
SC-70-5
-40 to 85
o
C
AP2125KS-2.8TRE1
AP2125KS-3.0TRE1
AP2125KS-3.3TRE1
AP2125KS-4.2TRE1
AP2125KC-1.8TRE1
AP2125KC-2.5TRE1
SC-82
-40 to 85
o
C
AP2125KC-2.8TRE1
AP2125KC-3.0TRE1
AP2125KC-3.3TRE1
AP2125KC-4.2TRE1
Green
AP2125N-1.8TRG1
AP2125N-2.5TRG1
AP2125N-2.8TRG1
AP2125N-3.0TRG1
AP2125N-3.3TRG1
AP2125N-4.2TRG1
AP2125K-1.8TRG1
AP2125K-2.5TRG1
AP2125K-2.8TRG1
AP2125K-3.0TRG1
AP2125K-3.3TRG1
AP2125K-4.15TRG1
AP2125K-4.2TRG1
AP2125KS-1.8TRG1
AP2125KS-2.5TRG1
AP2125KS-2.8TRG1
AP2125KS-3.0TRG1
AP2125KS-3.3TRG1
AP2125KS-4.2TRG1
AP2125KC-1.8TRG1
AP2125KC-2.5TRG1
AP2125KC-2.8TRG1
AP2125KC-3.0TRG1
AP2125KC-3.3TRG1
AP2125KC-4.2TRG1
ECC
26
35
27
36
28
34
91
96
92
97
93
95
EJ2
EJ4
EJ5
EJ6
EJ7
EJ3
ECB
ECD
ECE
ECF
ECG
Marking ID
Lead Free
Green
GJ2
GJ4
GJ5
GJ6
GJ7
GJ3
GCB
GCD
GCE
GCF
GCG
GCJ
GCC
B6
C5
B7
C6
B8
C4
T1
T6
T2
T7
T3
T5
Packing Type
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Package
Temperature
Range
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
May. 2010 Rev. 1. 4
4
BCD Semiconductor Manufacturing Limited
Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
AP2125
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
Enable Input Voltage
Output Current
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Symbol
V
IN
V
CE
I
OUT
T
J
T
STG
T
LEAD
SOT-23-3
θ
JA
SOT-23-5
SC-70-5
SC-82
ESD (Human Body Model)
ESD (Machine Model)
ESD
ESD
6000
400
Value
6.5
-0.3 to V
IN
+0.3
450
150
-65 to 150
260
200
200
300
300
V
V
o
C/W
Unit
V
V
mA
o
C
o
C
o
C
Thermal Resistance
Note 1: 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
Parameter
Input Voltage
Operating Ambient Temperature Range
Symbol
V
IN
T
A
Min
V
OUT
+0.5V
-40
Max
6
85
Unit
V
o
C
May. 2010 Rev. 1. 4
5
BCD Semiconductor Manufacturing Limited
以拆会友
