ON Semiconductor NCP1402 Technical data

NCP1402

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200 mA, PFM Step-Up Micropower Switching Regulator

The NCP1402 series are monolithic micropower step-up DC to DC converter that are specially designed for powering portable equipment from one or two cell battery packs.These devices are designed to startup with a cell voltage of 0.8 V and operate down to less than

0.3V. With only three external components, this series allow a simple means to implement highly efficient converters that are capable of up to 200 mA of output current at Vin = 2.0 V, V

Each device consists of an on-chip PFM (Pulse Frequency Modulation) oscillator, PFM controller, PFM comparator, soft-start, voltage reference, feedback resistors, driver, and power MOSFET switch with current limit protection. Additionally, a chip enable feature is provided to power down the converter for extended battery life.

The NCP1402 device series are available in the Thin SOT-23-5 package with five standard regulated output voltages. Additional voltages that range from 1.8 V to 5.0 V in 100 mV steps can be manufactured.

Features

•Extremely Low Startup Voltage of 0.8 V

•Operation Down to Less than 0.3 V

•High Efficiency 85% (V

•Low Operating Current of 30 A (V

= 2.0 V, V

in

OUT

•Output Voltage Accuracy ± 2.5%

•Low Converter Ripple with Typical 30 mV

•Only Three External Components Are Required

•Chip Enable Power Down Capability for Extended Battery Life

•Micro Miniature Thin SOT-23-5 Packages

•Pb-Free Packages are Available

Typical Applications

•Cellular Telephones

•Pagers

•Personal Digital Assistants (PDA)

•Electronic Games

•Portable Audio (MP3)

•Camcorders

•Digital Cameras

•Handheld Instruments

= 3.0 V.

OUT

= 3.0 V, 70 mA)

= 1.9 V)

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5

1

SOT23-5

(TSOP-5, SC59-5)

SN SUFFIX

CASE 483

PIN CONNECTIONS AND

MARKING DIAGRAM

1

CE

G

2

OUT

3

NC

(Top View)

xxx = Marking A = Assembly Location Y = Year W = Work Week G = Pb-Free Package

(Note: Microdot may be in either location)

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering information section on page 18 of this data sheet.

5

xxxAYW G

LX

GND

4

© Semiconductor Components Industries, LLC, 2007

May, 2007 - Rev. 8

1 Publication Order Number:

NCP1402/D

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NCP1402

V

in

CE

OUT

NC

1

NCP1402

2

3

LX

5

GND

4

Figure 1. Typical Step-Up Converter Application

V

OUT

NC

GND

2

PFM

COMPARATOR

-

3

REFERENCE

4

+

VOLTAGE

SOFT-ST ART

1 CE

VLX LIMITER

CONTROLLER

OSCILLATOR

Figure 2. Representative Block Diagram

PIN FUNCTION DESCRIPTIONS

Pin # Symbol Pin Description

1 CE Chip Enable pin

2 OUT Output voltage monitor pin, also the power supply pin of the device

3 NC No internal connection to this pin

4 GND Ground pin

5 LX External inductor connection pin to power switch drain

(1) The chip is enabled if a voltage which is equal to or greater than 0.9 V is applied (2) The chip is disabled if a voltage which is less than 0.3 V is applied (3) The chip will be enabled if it is left floating

LX 5

DRIVER

POWER

SWITCH

PFM

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2

NCP1402

ABSOLUTE MAXIMUM RATINGS

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Power Supply Voltage (Pin 2) V

Input/Output Pins

LX (Pin 5) LX Peak Sink Current

CE (Pin 1)

Input Voltage Range Input Current Range

Thermal Resistance, Junction-to-Air

Operating Ambient Temperature Range (Note 2) T

Operating Junction Temperature Range T

Storage Temperature Range T

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. NOTES:

1. This device series contains ESD protection and exceeds the following tests:

Human Body Model (HBM) ±2.0 kV per JEDEC standard: JESD22-A114. Machine Model (MM) ±200 V per JEDEC standard: JESD22-A115.

2. The maximum package power dissipation limit must not be exceeded.

3. Latchup Current Maximum Rating: ±150 mA per JEDEC standard: JESD78.

4. Moisture Sensitivity Level: MSL 1 per IPC/JEDEC standard: J-STD-020A.

PD+

T

J(max)

R

JA

Rating Symbol Value Unit

6.0 V

-0.3 to 6.0 400

-0.3 to 6.0

-150 to 150

250 °C/W

-40 to +85 °C

-40 to +125 °C

-55 to +150 °C

* T

OUT

V

LX

I

LX

V

CE

I

CE

R



JA

A

J

stg

A

V

mA

V

mA

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NCP1402

ELECTRICAL CHARACTERISTICS (For all values T

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= 25°C, unless otherwise noted.)

A

Characteristic Symbol Min Typ Max Unit

OSCILLATOR

Switch On Time (current limit not asserted) t

Switch Minimum Off Time t

Maximum Duty Cycle D

Minimum Startup Voltage (IO = 0 mA) V

Minimum Startup Voltage Temperature Coefficient (TA = -40°C to 85°C)

Minimum Operation Hold Voltage (IO = 0 mA) V

Soft-Start Time (V

u 0.8 V) t

OUT

LX (PIN 5)

Internal Switching N-Channel FET Drain Voltage V

LX Pin On-State Sink Current (VLX = 0.4 V)

Device Suffix: 19T1 27T1 30T1 33T1 40T1 50T1

Voltage Limit V

Off-State Leakage Current (VLX = 6.0 V, TA = -40°C to 85°C) I

CE (PIN 1)

CE Input Voltage (V

OUT

= V

SET

x 0.96) High State, Device Enabled Low State, Device Disabled

CE Input Current (Note 6)

High State, Device Enabled (V Low State, Device Disabled (V

= VCE = 6.0 V)

OUT

= 6.0 V, VCE = 0 V)

OUT

TOTAL DEVICE

Output Voltage

Device Suffix: 19T1 27T1 30T1 33T1 40T1 50T1

Output Voltage Temperature Coefficient (TA = -40°C to +85°C)

Device Suffix: 19T1 27T1 30T1 33T1 40T1 50T1

Operating Current 2 (V

Off-State Current (V

Operating Current 1 (V

= VCE = V

OUT

= 5.0 V, VCE = 0 V, TA = -40°C to +85°C, Note 6) I

OUT

= VCE = V

OUT

+0.5 V, Note 5) I

SET

x 0.96)

SET

Device Suffix: 19T1 27T1 30T1 33T1 40T1 50T1

5. V

means setting of output voltage.

SET

6. CE pin is integrated with an internal 10 M pullup resistor.

on

off

MAX

start

V

start

hold

SS

LX

I

LX

LXLIM

LKG

V

CE(high)

V

CE(low)

I

CE(high)

I

CE(low)

V

OUT

V

OUT

DD2

OFF

I

DD1

3.6 5.5 7.6

1.0 1.45 1.9

70 78 85 %

- 0.8 0.95 V

- -1.6 - mV/°C

0.3 - - V

0.3 2.0 - ms

- - 6.0 V

110 130 130 130 130 130

145 180 190 200 210 215

-

0.45 0.65 0.9 V

- 0.5 1.0

0.9

-

-0.5

1.853

2.632

2.925

3.218

3.900

4.875

-

0

0.15

1.9

2.7

3.0

3.3

4.0

5.0

-

0.3

0.5

1.948

2.768

3.075

3.383

4.100

5.125

ppm/°C

-

150 150 150 150 150 150

-

- 13 15

- 0.6 1.0

-

30 39 42 45 55 70

50 60 60

60 100 100

s

mA

A

V

A

V

A

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2.1

2.0

1.9

Vin = 0.9 V

1.8

Vin = 1.2 V

NCP1402SN19T1 L = 47 H TA = 25°C

Vin = 1.5 V

NCP1402

4.0

3.5

3.0

2.5

NCP1402SN30T1 L = 47 H TA = 25°C

Vin = 0.9 V

Vin = 1.2 V

Vin = 1.5 V

Vin = 2.5 V

Vin = 2.0 V

, OUTPUT VOLTAGE (V)

1.7

OUT

V

1.6 0

604020

80 100 120 140 160 180 200 0 604020 80 100 120 140 160 180 200

IO, OUTPUT CURRENT (mA)

Figure 3. NCP1402SN19T1 Output Voltage vs.

Output Current

6.0

Vin = 4.0 V

5.0

4.0

3.0

, OUTPUT VOLTAGE (V)

2.0

OUT

V

1.0

Vin = 1.2 V

Vin = 0.9 V

NCP1402SN50T1 L = 47 H TA = 25°C

0604020 80 100 120 140 160 180 200 0 604020 80 100 120 140 160 180 200

IO, OUTPUT CURRENT (mA)

Vin = 1.5 V

Vin = 2.0 V

Vin = 3.0 V

, OUTPUT VOLTAGE (V)

2.0

OUT

V

1.5

IO, OUTPUT CURRENT (mA)

Figure 4. NCP1402SN30T1 Output Voltage vs.

Output Current

100

80

60

40

EFFICIENCY (%)

20

Vin = 0.9 V Vin = 1.2 V

NCP1402SN19T1 L = 47 H TA = 25°C

0

IO, OUTPUT CURRENT (mA)

Vin = 1.5 V

Figure 5. NCP1402SN50T1 Output Voltage vs.

Output Current

100

Vin = 2.5 V

80

Vin = 2.0 V

60

Vin = 0.9 V Vin = 1.2 V Vin = 1.5 V

40

EFFICIENCY (%)

NCP1402SN30T1

20

L = 47 H TA = 25°C

0

0604020 80 100 120 140 160 180 200

IO, OUTPUT CURRENT (mA)

Figure 7. NCP1402SN30T1 Efficiency vs.

Output Current

100

80

60

40

EFFICIENCY (%)

20

0

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Figure 6. NCP1402SN19T1 Efficiency vs.

Output Current

Vin = 4.0 V

Vin = 3.0 V

Vin = 1.2 V

Vin = 0.9 V

NCP1402SN50T1 L = 47 H TA = 25°C

0604020 80 100 120 140 160 180 200

IO, OUTPUT CURRENT (mA)

Vin = 1.5 V

Vin = 2.0 V

Figure 8. NCP1402SN50T1 Efficiency vs.

Output Current

NCP1402

0

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2.1

2.0

1.9

1.8

, OUTPUT VOLTAGE (V)

1.7

NCP1402SN19T1

OUT

V

= 1.9 V x 0.96

OUT

Open-Loop Test

1.6

-50

TEMPERATURE (°C)

Figure 9. NCP1402SN19T1 Output Voltage vs.

Temperature

5.2

NCP1402SN50T1 V

= 5.0 V x 0.96

OUT

Open-Loop Test

5.1

5.0

3.2

3.1

3.0

2.9

, OUTPUT VOLTAGE (V)

2.8

NCP1402SN30T1

OUT

V

= 3.0 V x 0.96

OUT

Open-Loop Test

250-25

50 75 100 -50 250-25 50 75 10

2.7

TEMPERATURE (°C)

Figure 10. NCP1402SN30T1 Output Voltage vs.

Temperature

100

NCP1402SN19T1 V

= 1.9 V x 0.96

OUT

Open-Loop Test

80

60

4.9

, OUTPUT VOLTAGE (V)

4.8

OUT

V

4.7

-50 250-25 50 75 100 -50 250-25 50 75 10

TEMPERATURE (°C)

Figure 11. NCP1402SN50T1 Output Voltage vs.

Temperature

100

NCP1402SN30T1 V

= 3.0 V x 0.96

OUT

Open-Loop Test

80

60

40

20

, OPERATING CURRENT 1 (mA)

DD1

I

0

-50 250-25 50 75 100 -50 250-25 50 75 100

TEMPERATURE (°C)

40

20

, OPERATING CURRENT 1 (mA)

DD1

I

0

Figure 12. NCP1402SN19T1 Operating

Current 1 vs. Temperature

100

NCP1402SN50T1 V

= 5.0 V x 0.96

OUT

Open-Loop Test

80

60

40

20

, OPERATING CURRENT 1 (mA)

DD1

I

0

TEMPERATURE (°C)

Figure 13. NCP1402SN30T1 Operating

Current 1 vs. Temperature

Figure 14. NCP1402SN50T1 Operating

Current 1 vs. Temperature

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