Diodes AP3602A, AP3602B User Manual

Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

General Description

The AP3602A/B are regulated step-up DC/DC converters based on charge pump technique. These ICs have the ability to supply 100mA constant output current or 250mA peak output current for 100ms from

3.0V to 5V input (2.7V to 4.5 V for AP3602B), so they can be used as white LEDs driver or flash LED driver.

The AP3602A/B have very low power dissipation and high efficiency in typical applications. Other features include over-temperature protection, low temperature coefficient and etc. to meet some special requirements of hand-held battery powered devices.

Only 3 external capacitors are required in applications, which helps to save space and lower cost. These chips also have a disable terminal to turn on or turn off the chip to ease the use.

The AP3602A/B are available in SOT-23-6 package.

Features

· Low Quiescent Current: 13μA Typical

· Regulated Output Voltage Precision: 4%

· High Output Current:

100mA when V

50mA when V

· High Frequency: up to 1.2 MHz

· Low Shutdown Supply Current: <1

· High Output Peak Current: 250mA for 100ms

· Over Temperature Protection

· Operating Temperature Range: -40

IN

≥2.7V

IN

≥3.0V

μA

o

C to 85oC

Applications

· Mobile Phone Backlight Driver

· Camera Flash LED Driver

· MP3, MP4

· Handheld Device

· Portable Communication Device

SOT-23-6

Figure 1. Package Type of AP3602A/B

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

1

Data Sheet

1

2

34

5

Pin 1 Mark

6

100mA REGULATED CHARGE PUMP AP3602A/B

Pin Configuration

K Package

(SOT-23-6)

V

OUT

GND

SHDN

C+

V

C-

IN

Figure 2. Pin Configuration of AP3602A/B (Top View)

Pin Description

Pin Number Pin Name Function

1

V

OUT

2 GND

3 SHDN

Regulated Output Voltage. V

capacitor which is placed as close to the pin as possible for best performance

Ground. GND should be tied to a ground plane for best performance. The C

should be placed as close to this pin as possible

Active Low Shutdown Input. A low signal on SHDN disables the AP3602A/B, while a high

signal enables the AP3602A/B. SHDN

should be bypassed with a 1μF to 22μF low ESR ceramic

OUT

pin must not be allowed to float

OUT

and C

IN

4C-

5

6C+

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Flying Capacitor Negative Terminal. The flying capacitor should be placed as close to this pin as possible

IN

which is placed as close to the pin as possible for best performance

Input Supply Voltage. V

V

should be bypassed with a 1μF to 22μF low ESR ceramic capacitor

IN

Flying Capacitor Positive Terminal. The flying capacitor should be placed as close to this pin as possible

2

Data Sheet

3

5

4

2

1

1.25V

OSC

6

S3

S4

S1

S2

COMP

EN

R1

R2

CONTROL

+

-

OTP

100mA REGULATED CHARGE PUMP AP3602A/B

Functional Block Diagram

V

IN

SHDN

Ordering Information

Circuit Type

Output Voltage

A: 5V

B: 4.5V

Figure 3. Functional Block Diagram of AP3602A/B

AP3602

-

E1: RoHS G1: Green

TR: Tape and Reel

Package K: SOT-23-6

C+

C-

V

OUT

GND

Package

SOT-23-6

BCD Semiconductor's products as designated with "E1" suffix in the part number are RoHS compliant. Products with "G1" suffix are available in green packages.

Temperature

Range

-40 to 85

AP3602AKTR-E1 AP3602AKTR-G1 E7T G7T Tape & Reel

o

C

AP3602BKTR-E1 AP3602BKTR-G1 E8T G8T Tape & Reel

Part Number Marking ID

RoHS Green RoHS Green

Packing Type

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

3

Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Input Voltage V

Output Voltage V

SHDN

Pin Voltage V

Thermal Resistance (Junction to Ambient, no Heat sink) R

Operating Junction Temperature T

Storage Temperature Range T

Lead Temperature (Soldering, 10sec) T

IN

O

SHDN

θJA

J

STG

LEAD

7V

300

150

-65 to 150

260

o

C/W

o

C

ESD (Human Body Model) 2000 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.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage

V

IN

Operating Temperature T

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

AP3602A 2.7 5

AP3602B 2.7 4.5

A

-40 85

4

V

o

C

Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

Electrical Characteristics

(C

FLY

=1μF, CIN=C

=10μF, TA=25

OUT

o

C, unless otherwise specified.)

For AP3602A

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage V

Quiescent Current

Output Voltage

Shutdown Supply Current

Ripple Voltage

I

V

RIPPLE

Efficiency

Frequency f

SHDN

Input Threshold

High

SHDN

Input Threshold

Low

Input Current High I

SHDN

Input Current Low I

SHDN

V

Turn-on Time t

OUT

Short-Circuit Current I

IN

I

Q

V

O

SHDN

η

OSC

V

IH

V

IL

IH

IL

ON

SC

VO=5V 2.7 V

VIN=2.7V to 5.0V, IO=0mA,

=VIN, Not Switching

V

SHDN

2.7V<VIN<5V, I

3.0V<V

IN

2.7V<VIN<3.6V, IO=0, V

3.6V<V

IN

≤50mA

O

<5V, I

≤100mA

O

<5.0V, IO=0, V

SHDN

4.8 5.0 5.2

=0V 0.01 1

=0V 2.5

13 30 μA

VIN=2.7V, IO=50mA 25

O

V

μA

mV

VIN=3V, IO=100mA 30

VIN=2.7V, IO=50mA 92 %

Oscillator free running 1.2 MHz

1.4

V

0.3

V

=V

V

SHDN

IN

=GND -1 1

VIN=3V, IO=0mA 0.2

VIN=3V, VO=GND, V

=3V 300 mA

SHDN

-1 1 μA

ms

PP

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

5

Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

Electrical Characteristics (Continued)

(C

FLY

=1μF, CIN=C

=10μF, TA=25

OUT

o

C, unless otherwise specified.)

For AP3602B

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage V

Quiescent Current

Output Voltage

Shutdown Supply Current

Ripple Voltage

I

V

RIPPLE

Efficiency

Frequency f

SHDN

Input Threshold

High

SHDN

Input Threshold

Low

Input Current High I

SHDN

Input Current Low I

SHDN

V

Turn-on Time t

OUT

Short-Circuit Current I

IN

I

Q

V

O

SHDN

η

OSC

V

IH

V

IL

IH

IL

ON

SC

VO=4.5V 2.7 V

VIN=2.7V to 4.5V, IO=0mA,

=VIN, Not Switching

V

SHDN

13 30 μA

2.7V<VIN<4.5V, IO<50mA 4.32 4.5 4.68

3.0V<V

2.7V<VIN<3.6V, IO=0, V

3.6V<V

<4.5V, IO<100mA 4.32 4.5 4.68

IN

=0V 0.01 1

SHDN

<4.5V, IO=0, V

IN

=0V 2.5

SHDN

VIN=2.7V, IO=50mA 25

O

V

μA

mV

VIN=3V, IO=100mA 30

VIN=2.7V, IO=50mA 83 %

Oscillator free running 1.2 MHz

1.4

V

0.3

V

=V

V

SHDN

IN

=0V -1 1

VIN=3V, IO=0mA 0.2

VIN=3V, VO=GND, V

=3V 300 mA

SHDN

-1 1 μA

ms

PP

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

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Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

Application Information

Operating Principles

The AP3602A/B use a switched capacitor charge pump to boost the input voltage to a regulated output voltage. Regulation is achieved by sensing the chip output voltage through an internal resistor divider network. Controlled by an internal comparator (refer to the functional block diagram), the charge pump circuit is enabled when the divided output voltage is below a preset trip point .

The charge pump operates at 1.2MHz with 50% duty cycle. Conversion consists of a two-phase operation. In the first phase, switches S2 and S3 are opened and S1 and S4 are closed. During this time, C

the voltage on V

. During the second phase, S2 and S3 are closed,

C

OUT

and load current is supplied by

IN

and S1 and S4 are opened. This action connects C

low side to VIN, C

age about 2*V

IN

high side to V

FLY

is used to charge C

OUT

load current. For each cycle, charges is transported from V

IN

to V

to maintain the output voltage in its

OUT

nominal value.

This process breaks when the V

is high enough for

OUT

the reason of higher input voltage or lower load, then the divided voltage at the control comparator exceeds the internal trip point high level, which compels the charge pump circuit enter to the idle mode in which the switching cycle stops (pulse skipping) and the output voltage is continually decreased because it is maintained by the discharging of C

only. In idle mode,

OUT

the feedback circuit continues sensing V

charges to

FLY

, then a volt-

OUT

and supply the

. If the

OUT

FLY

divided voltage at the control comparator drops below the preset trip point, the comparator will start the switching cycle again.

In idle mode, the AP3602A/B's quiescent current is about 13

μA. In shutdown mode, all internal circuitry is

turned off and the AP3602A/B draw only leakage current from V

, which is less than 1μA. So, the shut-

IN

down power loss for AP3602A/B is very low, that is beneficial to the battery supplied systems.

Short Circuit and Thermal Protection

The AP3602A/B have a thermal protection and shutdown circuit that continuously monitors the IC junction temperature.

When output short circuit occurs, the short circuit current is about 300mA (Typical). Under this condition, the I

is about 2*Iout, which causes about 1.8W

IN

instant power dissipation on AP3602A/B, that will cause a rise in the internal IC junction temperature. If the thermal protection circuit senses the junction tem-

o

perature exceeding approximately 160 shutdown circuit will disable the charge pump switch-

ing circuit. The thermal hysteresis is about 10 means that the charge pump circuit can be active when the short circuit is removed and the junction tempera-

ture drops below 150

o

C.

The thermal shutdown protection will cycle on and off if an output short circuit condition persists. This will allow the AP3602A/B to operate on a short circuit condition without latch up or damage to the device.

C, the thermal

o

C, which

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

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Data Sheet

0 25 50 75 100 125 150

4.0

4.2

4.4

4.6

4.8

5.0

5.2

Output Voltage (V)

Output Current (mA)

AP3602-5.0V, VIN=3.0V AP3602-5.0V, VIN=2.7V

2.5 3.0 3.5 4.0 4.5 5.0

40

50

60

70

80

90

100

Efficiency (%)

Input Voltage (V)

AP3602-5.0V, I

OUT

=25mA

AP3602-5.0V, I

OUT

=50mA

AP3602-5.0V, I

OUT

=100mA

0.1 1 10 100

70.0

72.5

75.0

77.5

80.0

82.5

85.0

87.5

90.0

92.5

95.0

Efficiency (%)

Output Current (mA)

AP3602-5.0V, VIN=2.7V AP3602-5.0V, VIN=3.0V

V

SHDN

0V to 3V

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics

Typical Performance Characteristics for AP3602A

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

Figure 4. Output Voltage vs. Output Current

Figure 6. Efficiency vs. Output Current Figure 7. V

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Figure 5. Efficiency vs. Input Voltage

SHDN

2V/div

V

OUT

V

1V/div

Time 40μS/div

Start UpTime, @ No Load

OUT

8

Data Sheet

V

SHDN

0V to 3V

V

SHDN

0V to 3V

I

OUT

0mA to 50mA

I

OUT

0mA to 100mA

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602A (Continued)

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

SHDN

2V/div

V

OUT

V

1V/div

Figure 8. V

OUT

I

50mA/div

Time 40μS/div

Start Up Time, @ 50mA Load

OUT

SHDN

2V/div

V

OUT

V

1V/div

Figure 9. V

OUT

I

50mA/div

Time 40μS/div

Start Up Time, @ 100mA Load

OUT

V

50mV/div

Time 200μS/div Time 200μS/div

Figure 10. Load Transient Response

OUT

V

50mV/div

Figure 11. Load Transient Response

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

9

Data Sheet

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602A (Continued)

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

10mV/div

Output Ripple

Time 2mS/div

Figure 12. Output Ripple @ VIN=2.7V, I

10mV/div

Output Ripple

OUT

=0mA

10mV/div

Output Ripple

Time 400nS/div

Figure 13. Output Ripple @ VIN=2.7V, I

OUT

=50mA

Time 400nS/div

Figure 14. Output Ripple @ VIN=2.7V, I

OUT

=100mA

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

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Data Sheet

0 25 50 75 100 125 150

3.6

3.8

4.0

4.2

4.4

4.6

Output Voltage (V)

Output Current (mA)

AP3602-4.5V, VIN=3.0V AP3602-4.5V, VIN=2.7V

0.1 1 10 100

60.0

62.5

65.0

67.5

70.0

72.5

75.0

77.5

80.0

82.5

85.0

Efficiency (%)

Output Current (mA)

AP3602-4.5V, VIN=2.7V AP3602-4.5V, VIN=3.0V

2.53.03.54.04.5

40

50

60

70

80

90

Efficiency (%)

Input Voltage (V)

AP3602-4.5V, I

OUT

=25mA

AP3602-4.5V, I

OUT

=50mA

AP3602-4.5V, I

OUT

=100mA

I

OUT

0mA to 50mA

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602B

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

Figure 15. Output Voltage vs. Output Current

Figure 17. Efficiency vs. Output Current

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

11

OUT

I

50mA/div

OUT

V

Figure 16. Efficiency vs. Input Voltage

50mV/div

Time 200μS/div

Figure 18. Load Transient Response

Data Sheet

I

OUT

0mA to 100mA

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602B (Continued)

(Unless otherwise noted, V

OUT

I

50mA/div

OUT

V

50mV/div

=3.0V, CIN=C

IN

OUT

=10μF, C

Output Ripple

=1μF Ceramic Cap, TA=25

FLY

10mV/div

o

C)

Time 200μS/div

Figure 19. Load Transient Response

10mV/div

Output Ripple

Time 1μS/div

Figure 21. Output Ripple @ VIN=2.7V, I

OUT

=50mA

Time 40mS/div

Figure 20. Output Ripple @ VIN=2.7V, I

10mV/div

Output Ripple

Time 400nS/div

Figure 22. Output Ripple @ V

=2.7V, I

IN

OUT

=0mA

=100mA

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

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Data Sheet

2.53.03.54.04.55.0

1000

1100

1200

1300

1400

1500

1600

1700

1800

Frequency (kHz)

Supply Voltage (V)

TA=-50oC

TA=25oC

TA=100oC

-50-250 255075100

-1.00

-0.75

-0.50

-0.25

0.00

0.25

0.50

0.75

1.00

Normalized Output Voltage (%)

Temperature (oC)

VIN=3.0V, I

OUT

=25mA

012345

0

4

8

12

16

20

Supply Current (μA)

SHDN Voltage (V)

VIN=2.7V VIN=3.0V

2.53.03.54.04.55.0

10

12

14

16

18

20

Supply Current (μA)

Supply Voltage (V)

No Load, Not Switching

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602A/B

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

Figure 23. Supply Current vs. Supply Voltage

Figure 25. Oscillator Frequency vs. Supply Voltage

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Figure 24. Supply Current vs. SHDN

Voltage

Figure 26. Normalized Output Voltage vs. Temperature

13

Data Sheet

2.53.03.54.04.55.0

0.5

0.6

0.7

0.8

0.9

1.0

SHDN Input Threshold High Voltage (V)

Input Voltage (V)

TA=-40oC

TA=25oC

TA=85oC

2.53.03.54.04.55.0

0.5

0.6

0.7

0.8

0.9

1.0

SHDN Input Threshold Low Voltage (V)

Input Voltage (V)

TA=-40oC

TA=25oC

TA=85oC

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Performance Characteristics (Continued)

Typical Performance Characteristics for AP3602A/B (Continued)

(Unless otherwise noted, V

=3.0V, CIN=C

IN

OUT

=10μF, C

=1μF Ceramic Cap, TA=25

FLY

o

C)

Figure 27. VIH vs. VIN Figure 28. VIL vs. VIN

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

14

Data Sheet

VIN=2.7V to 4.2V

10μF

1μF

V

IN

V

OUT

GND

SHDN

AP3602A

C+ C-

10μF

4 * 120Ω

LED's VF=3.2V

VIN=2.7V to 4.2V

10μF

1μF

V

IN

V

OUT

GND

SHDN

AP3602B

C+ C-

4 * 91Ω

LED's VF=3.2V

10μF

100mA REGULATED CHARGE PUMP AP3602A/B

Typical Application

Figure 29. AP3602A Typical Application Circuit

Figure 30. AP3602B Typical Application Circuit

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

15

Data Sheet

2.820(0.111)

3.020(0.119)

2.650(0.104)

2.950(0.116)

1.500(0.059)

1.700(0.067)

0.950(0.037)TYP

1.800(0.071)

2.000(0.079)

0.300(0.012)

0.400(0.016)

0.700(0.028)REF

0.100(0.004)

0.200(0.008)

0° 8°

0.200(0.008)

0.300(0.012)

0.600(0.024)

0.000(0.000)

0.150(0.006)

0.900(0.035)

1.300(0.051)

1.450(0.057) MAX

123

4

5

6

Pin 1 Mark

100mA REGULATED CHARGE PUMP AP3602A/B

Mechanical Dimensions

SOT-23-6

Unit: mm(inch)

Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

16

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