ON NCP1400ASN19T1, NCP1400ASN25T1, NCP1400ASN27T1, NCP1400ASN30T1, NCP1400ASN33T1 Schematic

NCP1400A

100 mA, Fixed Frequency PWM Step-Up Micropower Switching Regulator

The NCP1400A series are micropower step–up DC to DC converters that are specifically designed for powering portable equipment from one or two cell battery packs. These devices are designed to start–up with a cell voltage of 0.8 V and operate down to less than 0.2 V. With only four external components, this series allows a simple means to implement highly efficient converters that are capable of up to 100 mA of output current.

Each device consists of an on–chip fixed frequency oscillator, pulse width modulation controller, phase compensated error amplifier that ensures converter stability with discontinuous mode operation, soft–start, voltage reference, 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 NCP1400A device series are available in the Thin SOT–23–5 package with six standard regulated output voltages. Additional voltages that range from 1.8 V to 4.9 V in 100 mV steps can be manufactured.

Features

• Extremely Low Start–Up Voltage of 0.8 V

• Operation Down to Less than 0.2 V

• Only Four External Components for Simple Highly Efficient

Converters

• Up to 100 mA Output Current Capability

• Fixed Frequency Pulse Width Modulation Operation

• Phase Compensated Error Amplifier for Stable Converter Operation

• Chip Enable Power Down Capability for Extended Battery Life

T ypical Applications

• Cellular Telephones

• Pagers

• Personal Digital Assistants

• Electronic Games

• Digital Cameras

• Camcorders

• Handheld Instruments

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5

1

THIN SOT–23–5

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 2 of this data sheet.

xxxYW

5

LX

GND

4

 Semiconductor Components Industries, LLC, 2002

January , 2002 – Rev. 4

V

in

CE

1

OUT

2

NC

3

Figure 1. Typical Step–Up Converter Application

LX

5

GND

NCP1400A

4

1 Publication Order Number:

V

out

NCP1400A/D

NCP1400A

3000 Units

Á

ORDERING INFORMATION

Output

Device

Voltage

NCP1400ASN19T1 1.9 V DAI NCP1400ASN25T1 2.5 V DAV NCP1400ASN27T1 2.7 V NCP1400ASN30T1 3.0 V NCP1400ASN33T1 3.3 V DAJ NCP1400ASN50T1 5.0 V DAD

NOTE: The ordering information lists six standard output voltage device options. Additional devices 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

LX (Pin 5)

ББББББББББББББББББ

LX Peak Sink Current

CE (Pin 1)

ББББББББББББББББББ

Input Voltage Range Input Current Range

ББББББББББББББББББ

Thermal Resistance Junction to Air Operating Ambient Temperature Range (Note 2) Operating Junction Temperature Range Storage Temperature Range

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. Latch–up Current Maximum Rating: 150 mA per JEDEC standard: JESD78.

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

T

P



D

J(max)

R

JA

 T

A

Switching

Frequency

180 KHz

Marking Package Shipping

DAA DAB

Thin SOT–23–5

V

OUT

V

ÁÁÁ

LX

I

LX

ÁÁÁ

V

CE

I

ÁÁÁ

CE

R

θ

JA

T

A

T

J

T

stg

–0.3 to 6.0

БББББ

400

БББББ

–0.3 to 6.0

–150 to 150

БББББ

250

–40 to +85 –40 to +125 –55 to +150

3000 Units

on 7 Inch Reel

ÁÁ

V

mA

V

mA

°C/W

°C °C °C

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2

NCP1400A

ELECTRICAL CHARACTERISTICS (For all values T

Characteristic

= 25°C, unless otherwise noted.)

A

Symbol Min Typ Max Unit

OSCILLATOR

Frequency (V

OUT

= V

x 0.96, Note 5) f

SET

OSC

144 180 216 kHz Frequency Temperature Coefficient (TA = –40°C to 85°C) f – 0.11 – %/°C Maximum PWM Duty Cycle (V Minimum Start–up Voltage (IO = 0 mA) V Minimum Start–up 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

= V

x 0.96) D

SET

MAX start

start hold SS

68 75 82 %

– 0.8 0.95 V – –1.6 – mV/°C

0.3 – – V

0.5 2.0 – ms

LX (PIN 5)

LX Pin On–State Sink Current (V

= 0.4 V)

LX

I

LX

Device Suffix:

19T1 25T1 27T1 30T1 33T1 50T1

Voltage Limit (V

= VCE = V

OUT

x 0.96, VLX “L’’ Side) V

SET

Off–State Leakage Current (VLX = 5.0 V, TA = –40°C to 85°C) I

LXLIM

LKG

80

80 100 100 100 100

0.65 0.8 1.0 V – 0.5 1.0 µA

90 120 125 130 135 160

– – – – – –

CE (PIN 1)

CE Input Voltage (V

High State, Device Enabled Low State, Device Disabled

OUT

= V

SET

x 0.96)

V

CE(high)

V

CE(low)

0.9 –

–

0.3

CE Input Current (Note 6)

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

= VCE = 5.0 V)

OUT

= 5.0 V, VCE = 0 V)

OUT

I

CE(high)

I

CE(low)

–0.5 –0.5

0

0.15

0.5

TOTAL DEVICE

Output Voltage (V

 0.8 V, IO = 4.0 mA)

in

V

OUT

Device Suffix:

19T1 25T1 27T1 30T1 33T1 50T1

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

V

1.853

2.438

2.633

2.925

3.218

4.875

OUT

1.9

2.5

2.7

3.0

3.3

5.0

1.948

2.563

2.768

3.075

3.383

5.125

Device Suffix:

19T1 25T1 27T1 30T1 33T1

50T1 Operating Current 2 (V Off–State Current (V

OUT

Operating Current 1 (V

= VCE = V

OUT

+0.5 V, Note 5) I

SET

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

= VCE = V

OUT

SET

x 0.96, f

= 180 kHz)

OSC

DD2 OFF

I

DD1

– – – – – –

– 7.0 15 µA – 0.6 1.5 µA

100 100 100 100 100 150

– – – – – –

Device Suffix:

19T1

25T1

27T1

30T1

33T1

50T1

5. V

means setting of output voltage.

SET

6. CE pin is integrated with an internal 10 MΩ pull–up resistor.

– – – – – –

23 32 32 37 37 70

50 60 60 60 60

100

mA

V

µA

V

ppm/°C

µA

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3

NCP1400A

2.1

2.0

1.9

1.8

, OUTPUT VOLTAGE (V)

NCP1400ASN19T1

1.7

OUT

V

L = 22 µH T

1.6 0

6.0

5.5

5.0

Vin= 0.9 V

4.5

NCP1400ASN50T1

, OUTPUT VOLTAGE (V)

L = 22 µH

4.0

OUT

V

T

3.5 0

Vin= 1.5 V

Vin= 0.9 V Vin= 1.2 V

= 25°C

A

4020

, OUTPUT CURRENT (mA)

I

O

60 80

Figure 2. NCP1400ASN19T1 Output Voltage

vs. Output Current

Vin= 3.0 V

Vin= 1.5 V

= 25°C

A

20 100

IO, OUTPUT CURRENT (mA)

Vin= 2.0 V

806040

Figure 4. NCP1400ASN50T1 Output Voltage

vs. Output Current

100

3.4

3.2 Vin= 2.0 V

3.0

Vin= 0.9 V

2.8

, OUTPUT VOLTAGE (V) V

NCP1400ASN30T1 L = 22 µH

2.6

OUT

2.4

= 25°C

T

A

080604020 100

Vin= 1.2 V

I

, OUTPUT CURRENT (mA)

O

Vin= 1.5 V

Figure 3. NCP1400ASN30T1 Output Voltage

vs. Output Current

100

80

60

Vin= 0.9 V

40

EFFICIENCY (%)

NCP1400ASN19T1 L = 22 µH

20

= 25°C

T

A

0

0806040 10020

Vin= 1.2 V

IO, OUTPUT CURRENT (mA)

Vin= 1.5 V

Figure 5. NCP1400ASN19T1 Efficiency vs.

Output Current

100

Vin= 2.5 V

80

Vin= 0.9 V

60

40

EFFICIENCY (%)

NCP1400ASN30T1 L = 22 µH

20

= 25°C

T

A

0

0604020 80 100

Vin= 1.2 V

IO, OUTPUT CURRENT (mA)

Vin= 1.5 V

Vin= 2.0 V

Figure 6. NCP1400ASN30T1 Efficiency vs.

Output Current

100

80

60

40

EFFICIENCY (%)

20

0

080604020 100

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4

Vin= 3.0 V

Vin= 0.9 V

NCP1400ASN50T1 L = 22 µH

= 25°C

T

A

Vin= 1.5 V

Vin= 2.0 V

IO, OUTPUT CURRENT (mA)

Figure 7. NCP1400ASN50T1 Efficiency vs.

Output Current

NCP1400A

, OPERATING CURRENT (µA)

DD1

I

80 70 60 50 40 30 20 10

100

80

60

NCP1400ASNXXT1 L = 10 µH

= 25°C

T

A

0

1.5

2.0 V

, OUTPUT VOLTAGE (V)

OUT

3.5

4.03.02.5 4.5

Figure 8. NCP1400ASNXXT1 Operating

Current (I

) vs. Output Voltage

DD1

5.5 –50 50 75250 100–25

5.0

100

80

60

40

NCP1400ASN30T1

, OPERATING CURRENT (µA)

20

V

DD1

I

Open–loop Test

0

1.0

0.8

0.6

= 3.0 V x 0.96

OUT

, AMBIENT TEMPERATURE (°C)

T

A

Figure 9. NCP1400ASN30T1 Current

Consumption vs. Temperature

, VOLTAGE LIMIT (V)

40

NCP1400ASN50T1 V

= 5.0 V x 0.96

, OPERATING CURRENT (µA)

DD1

I

20

OUT

Open–loop Test

0 –50 50 75250 100–25 –50 50 75250 100–25

0.4

LX

, V

0.2

LXLIM

V

TA, AMBIENT TEMPERATURE (°C)

Figure 10. NCP1400ASN50T1 Current

Consumption vs. Temperature

1.0

0.8

0.6

, VOLTAGE LIMIT (V)

0.4

LX

, V

LXLIM

V

NCP1400ASN30T1

0.2

V

= 3.0 V x 0.96

OUT

0

–50 50 75250 100–25 –50 50 75250 100–25

TA, AMBIENT TEMPERATURE (°C)

1.0

0.8

0.6

, VOLTAGE LIMIT (V)

0.4

LX

, V

0.2

LXLIM

V

Figure 12. NCP1400ASN30T1 VLX Voltage Limit

vs. Temperature

NCP1400ASN19T1 V

= 1.9 V x 0.96

OUT

0

TA, AMBIENT TEMPERATURE (°C)

Figure 11. NCP1400ASN19T1 VLX Voltage Limit

vs. Temperature

NCP1400ASN50T1 V

= 5.0 V x 0.96

OUT

0

TA, AMBIENT TEMPERATURE (°C)

Figure 13. NCP1400ASN50T1 VLX Voltage Limit

vs. Temperature

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5

NCP1400A

0

3.2

3.1

3.0

2.9

, OUTPUT VOLTAGE (V)

OUT

V

NCP1400ASN30T1 L = 10 µH

2.8

2.7

= 4.0 mA

I

O

V

= 1.2 V

in

–50 50 75250 100–25 –50 50 75250 100–25

T

, AMBIENT TEMPERATURE (°C)

A

5.1

5.0

4.9

4.8

, OUTPUT VOLTAGE (V)

4.7

OUT

V

4.6

Figure 14. NCP1400ASN30T1 Output Voltage

vs. Temperature

300

250

200

150

300

250

200

150

NCP1400ASN50T1 L = 10 µH I

= 4.0 mA

O

V

= 1.2 V

in

TA, AMBIENT TEMPERATURE (°C)

Figure 15. NCP1400ASN50T1 Output Voltage

vs. Temperature

100

NCP1400ASN30T1 V

= 3.0 V x 0.96

, OSCILLATOR FREQUENCY (kHz)

50

OSC

f

OUT

Open–loop Test

0 –50 50 75250 100–25

TA, AMBIENT TEMPERATURE (°C)

Figure 16. NCP1400ASN30T1 Oscillator

Frequency vs. T emperature

100

90

80

70

60

, MAXIMUM DUTY CYCLE (%)

MAX

D

NCP1400ASN30T1 V

50

40

OUT

Open–loop Test

–50 50 100250–25

= 3.0 V x 0.96

TA, AMBIENT TEMPERATURE (°C)

Figure 18. NCP1400ASN30T1 Maximum Duty

Cycle vs. T emperature

75

100

NCP1400ASN50T1 V

, OSCILLATOR FREQUENCY (kHz)

50

OSC

f

0

–50 50 7525010

= 5.0 V x 0.96

OUT

Open–loop Test

–25

TA, AMBIENT TEMPERATURE (°C)

Figure 17. NCP1400ASN50T1 Oscillator

Frequency vs. T emperature

100

90

80

70

60

, MAXIMUM DUTY CYCLE (%)

MAX

D

NCP1400ASN50T1 V

50

40

OUT

Open–loop Test

–50 50 100250–25

= 5.0 V x 0.96

TA, AMBIENT TEMPERATURE (°C)

75

Figure 19. NCP1400ASN50T1 Maximum Duty

Cycle vs. T emperature

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6

ON NCP1400ASN19T1, NCP1400ASN25T1, NCP1400ASN27T1, NCP1400ASN30T1, NCP1400ASN33T1 Schematic [ru]