Diodes AP2121 User Manual

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

General Description

The AP2121 series are positive voltage regulator ICs
fabricated by CMOS process. Each of these ICs con­sists of a voltage reference, an error amplifier, a resis­tor network for setting output voltage, a current limit
circuit for current protection and a chip-enable circuit
(5-pin products only).

The AP2121 series feature high supply voltage 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
devices.

The AP2121 series have 1.2V, 1.3V, 1.5V, 1.8V, 2.5V,

2.8V, 2.85V, 3.0V, 3.2V and 3.3V versions.

The AP2121 are available in standard SOT-23-3, SOT­23-5 and CSP-4 packages.

Features

· Low Dropout Voltage at I

Typical (Except 1.2V, 1.3V and 1.5V Versions)

· Low Standby Current: 0.1μA Typical

· Low Quiescent Current: 25μA Typical

· High Ripple Rejection: 70dB Typical （f=1kHz）

· Output Current: More Than 200mA (300mA

Limit)

· Extremely Low Noise: 30μVrm s (10Hz to

100kHz)

· Excellent Line Regulation: 4mV Typical

· Excellent Load Regulation: 12mV Typical

· High Output Voltage Accuracy: ±2%

· Excellent Line Transient Response and Load

Transient Response

· Compatible with Low ESR Ceramic Capacitor (as

Low as 1μF)

=100mA: 150mV

OUT

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-23-5SOT-23-3 CSP-4

Figure 1. Package Types of AP2121

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

1

3

21

1

2

34

5

A1 A2

B1 B2

Pin 1 Mark

CE V

IN

GND V

OUT

A1 A2

B1 B 2

Pin 1 Mark

CE

V

IN

GND

V

OUT

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Pin Configuration

N Package

(SOT-23-3)

V

IN

GND

V

OUT

J4/J4A Package

(CSP-4 (P 0.5)/CSP-4 (P 0.4))

K Package

(SOT-23-5)

V

GND

CE

(CSP-4 (P 0.5)/CSP-4 (P 0.4))

IN

V

NC

J4C/J4B Package

OUT

Figure 2. Pin Configuration of AP2121 (Top View)

Pin Description

Pin Number

SOT-23-3 SOT-23-5 CSP-4

(J4/J4A)

CSP-4

(J4C/J4B)

3 1 A2 A1 V

1 2 B1 B2 GND Ground

3 A1 B1 CE Active high enable input pin. Logic high=enable,

4 NC No connection

25B2A2V

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

Pin Name Function

IN

Input voltage

logic low=shutdown

OUT

Regulated output voltage

2

VREF

CURRENT LIMIT

VREF

CURRENT LIMIT

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Functional Block Diagram

3

V

IN

2

V

OUT

1

GND

SOT-23-3

1/A2/A1

V

IN

CE

SOT-23-5/CSP-4(J4/J4A)/CSP-4(J4C/J4B)

5/B2/A2

2/B1/B23/A1/B1

V

OUT

GND

Figure 3. Functional Block Diagram of AP2121

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

3

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Ordering Information

Package

SOT-23-3

SOT-23-5

Circuit Type

A: Active High

(Pull-down resistor built-in)

Blank: No Enable Function

Package

N: SOT-23-3
K: SOT-23-5

J4: CSP-4(P 0.5)
J4A: CSP-4 (P 0.4)
J4C: CSP-4(P 0.5)
J4B: CSP-4 (P 0.4)

Temperature

Range

o

C

-40 to 85

Active High (Pull-down resistor built-in) AP2121AK-1.2TRE1 AP2121AK-1.2TRG1 E1T G1T Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-1.3TRE1 AP2121AK-1.3TRG1 E1R G1R Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-1.5TRE1 AP2121AK-1.5TRG1 E1Z G1Z Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-1.8TRE1 AP2121AK-1.8TRG1 E1U G1U Tape & Reel

o

Active High (Pull-down resistor built-in) AP2121AK-2.5TRE1 AP2121AK-2.5TRG1 E1V G1V Tape & Reel

C

-40 to 85

Active High (Pull-down resistor built-in) AP2121AK-2.8TRE1 AP2121AK-2.8TRG1 E1W G1W Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-3.0TRE1 AP2121AK-3.0TRG1 E1X G1X Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-3.2TRE1 AP2121AK-3.2TRG1 E3Z G3Z Tape & Reel

Active High (Pull-down resistor built-in) AP2121AK-3.3TRE1 AP2121AK-3.3TRG1 E1Y G1Y Tape & Reel

AP2121 -

Condition

AP2121N-1.2TRE1 AP2121N-1.2TRG1 EF9 GF9 Tape & Reel

AP2121N-1.3TRE1 AP2121N-1.3TRG1 EG9 GG9 Tape & Reel

AP2121N-1.5TRE1 AP2121N-1.5TRG1 EF1 GF1 Tape & Reel

AP2121N-1.8TRE1 AP2121N-1.8TRG1 EF3 GF3 Tape & Reel

AP2121N-2.5TRE1 AP2121N-2.5TRG1 EF4 GF4 Tape & Reel

AP2121N-2.8TRE1 AP2121N-2.8TRG1 EF5 GF5 Tape & Reel

AP2121N-3.0TRE1 AP2121N-3.0TRG1 EF6 GF6 Tape & Reel

AP2121N-3.2TRE1 AP2121N-3.2TRG1 EF7 GF7 Tape & Reel

AP2121N-3.3TRE1 AP2121N-3.3TRG1 EF8 GF8 Tape & Reel

E1: Lead Free
G1: Green

TR: Tape and Reel

1.2: Fixed Output 1.2V

1.3: Fixed Output 1.3V

1.5: Fixed Output 1.5V

1.8: Fixed Output 1.8V

2.5: Fixed Output 2.5V

2.8: Fixed Output 2.8V

2.85: Fixed Output 2.85V

3.0: Fixed Output 3.0V

3.2: Fixed Output 3.2V

3.3: Fixed Output 3.3V

Part Number Marking ID

Lead Free Green Lead Free Green

Packing

Typ e

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

4

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Ordering Information (Continued)

Package

CSP-4

CSP-4

Te mp e ra tu r e

Range

o

-40 to 85

C

o

C

-40 to 85

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

Condition

Part Number Marking ID

Lead Free Green Lead Free Green

AP2121AJ4A-

1.2TRG1

AP2121AJ4A-

1.3TRG1

AP2121AJ4A-

1.5TRG1

AP2121AJ4A-

1.8TRG1

AP2121AJ4A-

2.5TRG1

AP2121AJ4A-

2.8TRG1

AP2121AJ4A-

2.85TRG1

AP2121AJ4A-

3.0TRG1

AP2121AJ4A-

3.2TRG1

AP2121AJ4A-

3.3TRG1

AP2121AJ4-

1.2TRG1

AP2121AJ4-

1.3TRG1

AP2121AJ4-

1.5TRG1

AP2121AJ4-

1.8TRG1

AP2121AJ4-

2.5TRG1

AP2121AJ4-

2.8TRG1

AP2121AJ4-

2.85TRG1

AP2121AJ4-

3.0TRG1

AP2121AJ4-

3.2TRG1

AP2121AJ4-

3.3TRG1

CB Tape & Reel

CC Tape & Reel

CD Tape & Reel

CE Tape & Reel

CF Tape & Reel

CG Tape & Reel

DD Tape & Reel

CH Tape & Reel

DA Tape & Reel

DB Tape & Reel

BA Tape & Reel

BB Tape & Reel

BC Tape & Reel

BD Tape & Reel

BE Tape & Reel

BF Tape & Reel

DC Tape & Reel

BG Tape & Reel

BH Tape & Reel

CA Tape & Reel

Packing

Typ e

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

5

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Ordering Information (Continued)

Package

CSP-4

CSP-4

Te mp e ra tu r e

Range

o

-40 to 85

C

o

C

-40 to 85

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.4 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

0.5 Pitch

Condition

Part Number Marking ID

Lead Free Green Lead Free Green

AP2121AJ4B-

1.2TRG1

AP2121AJ4B-

1.3TRG1

AP2121AJ4B-

1.5TRG1

AP2121AJ4B-

1.8TRG1

AP2121AJ4B-

2.5TRG1

AP2121AJ4B-

2.8TRG1

AP2121AJ4B-

2.85TRG1

AP2121AJ4B-

3.0TRG1

AP2121AJ4B-

3.2TRG1

AP2121AJ4B-

3.3TRG1

AP2121AJ4C-

1.2TRG1

AP2121AJ4C-

1.3TRG1

AP2121AJ4C-

1.5TRG1

AP2121AJ4C-

1.8TRG1

AP2121AJ4C-

2.5TRG1

AP2121AJ4C-

2.8TRG1

AP2121AJ4C-

2.85TRG1

AP2121AJ4C-

3.0TRG1

AP2121AJ4C-

3.2TRG1

AP2121AJ4C-

3.3TRG1

DE Tape & Reel

DF Tape & Reel

DG Tape & Reel

DH Tape & Reel

EA Tape & Reel

EB Tape & Reel

EC Tape & Reel

ED Tape & Reel

EE Tape & Reel

EF Tape & Reel

EG Tape & Reel

EH Tape & Reel

FA Tape & Reel

FB Tape & Reel

FC Tape & Reel

FD Tape & Reel

FE Tape & Reel

FF Tape & Reel

FG Tape & Reel

FH Tape & Reel

Packing

Typ e

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.

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

6

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Input Voltage V

Enable Input Voltage V

Output Current I

Junction Temperature T

Storage Temperature Range T

Lead Temperature (Soldering, 10sec) T

LEAD

IN

CE

OUT

J

STG

6.5 V

-0.3 to VIN+0.3 V

300 mA

150

-65 to 150

260

o

o

o

C

C

C

SOT-23-3 250
Thermal Resistance (Junction to Ambient)
(Note 2)

θ

JA

SOT-23-5 250

o

C/W

CSP-4 126

ESD (Human Body Model) ESD 2000 V

ESD (Machine Model) ESD 200 V

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.
Note 2: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifica­tions do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a
function of the maximum junction temperature, T

perature, T

)/θ

T

A

The maximum allowable power dissipation at any ambient temperature is calculated using: P

A.

Exceeding the maximum allowable power dissipation will result in excessive die temperature.

JA.

the junction-to-ambient thermal resistance, θ

J(max),

and the ambient tem-

JA,

=(T

D(max)

J(max)

-

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage V

Operating Ambient Temperature Range T

IN

A

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

7

26 V

-40 85

o

C

Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Electrical Characteristics
AP2121-1.2 Electrical Characteristics

(VIN=2.2V, TJ=25oC, CIN=1μF, C

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage

Input Voltage V

Output Current I

Load Regulation

Line Regulation

V

V

Dropout Voltage

OUT

=1μF,

V

OUT

OUT

RLOAD

RLINE

V

DROP

Bold

typeface applies over -40oC≤TJ≤

VIN=2.2V

1mA≤I

IN

VIN-V

≤30mA

OUT

=1V 200 mA

OUT

VIN=2.2V

OUT

≤80mA

1mA≤I

2.2V≤VIN≤6V

=30mA

I

OUT

I

=10mA 700 900

OUT

I

=100mA 700 900

OUT

=150mA 700 900

I

OUT

I

=200mA 700 900

OUT

85oC,

unless otherwise specified.)

1.176 1.2 1.224 V

12 40 mV

416mV

6V

mV

Quiescent Current

Standby Current

Power Supply
Rejection Ratio

(ΔV

ΔV

OUT/VOUT

Output Voltage
Temperature Coefficient

Short Current Limit I

RMS Output Noise

I

I

STD

PSRR

OUT

LIMIT

V

NOISE

Q

VIN=2.2V, I

VIN=2.2V

in OFF mode

V

CE

Ripple 0.5Vp-p, f=1kHz

=2.2V

V

IN

/ΔT

I

=30mA

)/ΔT

OUT

V

=0V 50 mA

OUT

TA=25oC

10Hz ≤f≤100kHz

OUT

=0mA

25 50

0.1 1

μA

μA

70 dB

±120

±100

30

μV/

ppm/

μVrm s

CE "High" Voltage CE input voltage "High" 1.5 V

CE "Low" Voltage CE input voltage "Low" 0.25 V

CE Pull-down Resistance

R

PD

2.5 5 10 MΩ

SOT-23-3 74
Thermal Resistance
(Junction to Case)

θ

JC

SOT-23-5 74

o

C/W

CSP-4 5

o

C

o

C

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

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Data Sheet

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

Electrical Characteristics (Continued)
AP2121-1.3 Electrical Characteristics

(VIN=2.3V, TJ=25oC, CIN=1μF, C

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage

Input Voltage V

Output Current I

Load Regulation

Line Regulation

Dropout Voltage

OUT

V

V

=1μF,

V

OUT

OUT

RLOAD

RLINE

V

DROP

Bold

typeface applies over -40oC≤TJ≤

VIN=2.3V

1mA≤I

IN

VIN-V

≤30mA

OUT

=1V 200 mA

OUT

VIN=2.3V

OUT

≤80mA

1mA≤I

2.3V≤VIN≤6V

=30mA

I

OUT

I

=10mA 600 800

OUT

I

=100mA 600 800

OUT

=150mA 600 800

I

OUT

I

=200mA 600 800

OUT

85oC,

unless otherwise specified.)

1.274 1.3 1.326 V

12 40 mV

416mV

6V

mV

Quiescent Current

Standby Current

Power Supply
Rejection Ratio

(ΔV

ΔV

OUT/VOUT

Output Voltage
Temperature Coefficient

Short Current Limit I

RMS Output Noise

I

I

STD

PSRR

OUT

LIMIT

V

NOISE

Q

VIN=2.3V, I

VIN=2.3V

in OFF mode

V

CE

Ripple 0.5Vp-p, f=1kHz

=2.3V

V

IN

/ΔT

I

=30mA

)/ΔT

OUT

V

=0V 50 mA

OUT

TA=25oC

10Hz ≤f≤100kHz

OUT

=0mA

25 50

0.1 1

μA

μA

70 dB

±130

±100

30

μV/

ppm/

μVrms

CE "High" Voltage CE input voltage "High" 1.5 V

CE "Low" Voltage CE input voltage "Low" 0.25 V

CE Pull-down Resistance

R

PD

2.5 5 10 MΩ

SOT-23-3 74
Thermal Resistance
(Junction to Case)

θ

JC

SOT-23-5 74

o

C/W

CSP-4 5

o

C

o

C

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

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