ON NCP1402SN19T1, NCP1402SN27T1, NCP1402SN30T1, NCP1402SN33T1, NCP1402SN40T1 Schematic

NCP1402

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 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

• Pb−Free Packages are Available

• 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

• 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

in

= 2.0 V, V

in

= 2.0 V, V

OUT

= 1.9 V)

OUT

= 3.0 V.

OUT

= 3.0 V, 70 mA)

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5

1

SOT23−5

(TSOP−5, SC59−5)

SN SUFFIX

CASE 483

PIN CONNECTIONS AND

MARKING DIAGRAM

1

CE

2

OUT

3

NC

xxx = Marking Y = Year W = Work Week

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering information section on page 3 of this data sheet.

xxxYW

5

LX

GND

4

T ypical Applications

• Cellular Telephones

• Pagers

• Personal Digital Assistants (PDA)

• Electronic Games

• Portable Audio (MP3)

• Camcorders

• Digital Cameras

• Handheld Instruments

 Semiconductor Components Industries, LLC, 2004

October, 2004 − Rev. 6

1 Publication Order Number:

NCP1402/D

NCP1402

1

CE

Chi Enable in

() g q g

OUT

NC

GND

V

in

CE

OUT

NC

1

NCP1402

2

3

LX

5

GND

4

V

OUT

Figure 1. T ypical Step−Up Converter Application

2

PFM

COMPARATOR

−

3

REFERENCE

4

+

VOLTAGE

SOFT−START

VLX LIMITER

DRIVER

POWER SWITCH

PFM

CONTROLLER

PFM

OSCILLATOR

LX 5

1 CE

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

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2

NCP1402

Á

ORDERING INFORMATION

Device Output Voltage Device Marking Package Shipping

NCP1402SN19T1 1.9 V DAU NCP1402SN27T1 2.7 V DAE NCP1402SN30T1 3.0 V DAF

SOT23−5

NCP1402SN33T1 3.3 V DAG NCP1402SN33T1G 3.3 V DAG SOT23−5

(Pb−Free)

3000 Units Per Reel

NCP1402SN40T1 4.0 V DCR NCP1402SN50T1 5.0 V DAH NCP1402SN50T1G 5.0 V DAH

SOT23−5

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

NOTE: The ordering information lists five standard output voltage device options. Additional device with output voltage ranging from 1.8 V to

5.0 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability.

ABSOLUTE MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage (Pin 2) Input/Output Pins

БББББББББББББББББББББ

LX (Pin 5) LX Peak Sink Current

БББББББББББББББББББББ

CE (Pin 1)

Input Voltage Range

БББББББББББББББББББББ

Input Current Range Thermal Resistance, Junction−to−Air Operating Ambient Temperature Range (Note 2) Operating Junction Temperature Range Storage Temperature Range

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously . If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 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.

T

P



D

J(max)

R

JA

 T

A

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

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

V

OUT

ÁÁ

V

LX

I

LX

ÁÁ

V

CE

ÁÁ

I

CE

R



JA

T

A

T

J

T

stg

6.0

ÁÁÁÁ

−0.3 to 6.0 400

ÁÁÁÁ

−0.3 to 6.0

ÁÁÁÁ

−150 to 150 250

−40 to +85

−40 to +125

−55 to +150

†

Á

mA

Á

mA

°C/W

°C °C °C

V

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NCP1402

ELECTRICAL CHARACTERISTICS (For all values T

= 25°C, unless otherwise noted.)

A

Characteristic

OSCILLATOR

Switch On Time (current limit not asserted) 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) V Minimum Operation Hold Voltage (IO = 0 mA) V Soft−Start Time (V

 0.8 V) t

OUT

LX (PIN 5)

Internal Switching N−Channel FET Drain Voltage 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.

Symbol Min Typ Max Unit

t

on off

MAX

start

start hold SS

V

LX

I

LX

LXLIM

LKG

3.6 5.5 7.6 s

1.0 1.45 1.9 s 70 78 85 %

− 0.8 0.95 V

− −1.6 − mV/°C

0.3 − − V

0.3 2.0 − ms

− − 6.0 V mA

110 130 130 130 130 130

145 180 190 200 210 215

−

0.45 0.65 0.9 V

− 0.5 1.0 A

V

CE(high)

V

CE(low)

0.9

−

0.3 A

I

CE(high)

I

CE(low)

V

OUT

V

OUT

DD2 OFF

I

DD1

−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

150 150 150 150 150 150

0.5

1.948

2.768

3.075

3.383

4.100

5.125

−

− 13 15 A

− 0.6 1.0 A

−

30 39 42 45 55 70

50 60 60

60 100 100

V

ppm/°C

A

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NCP1402

2.1

2.0

1.9

1.8

, OUTPUT VOLTAGE (V)

1.7

OUT

V

1.6 0

Vin = 0.9 V

I

O

Vin = 1.2 V

604020

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

, OUTPUT CURRENT (mA)

NCP1402SN19T1 L = 47 H

= 25°C

T

A

Vin = 1.5 V

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 T

= 25°C

A

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

4.0 NCP1402SN30T1 L = 47 H

3.5

3.0

2.5

, OUTPUT VOLTAGE (V)

2.0

OUT

V

1.5

= 25°C

T

A

Vin = 0.9 V

Vin = 1.5 V

Vin = 1.2 V

I

, OUTPUT CURRENT (mA)

O

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 T

= 25°C

A

0

IO, OUTPUT CURRENT (mA)

Vin = 1.5 V

Vin = 2.5 V

Vin = 2.0 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

= 25°C

T

A

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

= 25°C

T

A

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

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

250−25

50 75 100 −50 250−25 50 75 10

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

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

40

, 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

20

, OPERATING CURRENT 1 (mA)

DD1

I

0

Figure 12. NCP1402SN19T1 Operating

Current 1 vs. Temperature

TEMPERATURE (°C)

100

NCP1402SN30T1 V

= 3.0 V x 0.96

OUT

Open−Loop Test

80

60

40

20

, OPERATING CURRENT 1 (mA)

DD1

I

0

100

NCP1402SN50T1 V

= 5.0 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)

TEMPERATURE (°C)

Figure 13. NCP1402SN30T1 Operating

Current 1 vs. Temperature

Figure 14. NCP1402SN50T1 Operating

Current 1 vs. Temperature

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ON NCP1402SN19T1, NCP1402SN27T1, NCP1402SN30T1, NCP1402SN33T1, NCP1402SN40T1 Schematic [ru]