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300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2125

Data Sheet

BCD Semiconductor Manufacturing LimitedSep. 2012 Rev. 1. 5

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

Figure 1. Package Types of AP2125

SOT-23-3 SOT-23-5 SC-70-5

SC-82

1 2 3 4 5 6 ... 26 27

Resumo do Conteúdo

Página 1 - Applications

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Página 2 - Pin Description

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Página 3 - Functional Block Diagram

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Página 4 - Ordering Information

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Página 5

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Página 6 - Electrical Characteristics

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Página 7

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Página 8

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Página 9

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Página 10

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Página 11 - Data Sheet

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Página 12

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Página 13

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Página 14 - Figure 11. Current Limit

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Página 15

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Página 16

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Página 17

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Página 18

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Página 19

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Página 20

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the

Página 21

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Página 22 - Typical Application

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2125 Data Sheet4BCD Semiconductor Manufacturing LimitedSep. 2012 Re

Página 23 - SOT-23-3 Unit: mm(inch)

300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2125 Data Sheet5BCD Semiconductor Manufacturing LimitedSep. 2012 Re

Página 24 - SOT-23-5 Unit: mm(inch)

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Página 25 - SC-70-5 Unit: mm(inch)

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Página 26 - SC-82 Unit: mm(inch)

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Página 27

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