ON Semiconductor NCP1404 Technical data

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NCP1404 Series

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350 mA PWM/PFM Step-Up
DC-DC Converter with Low
Battery Detector

The NCP1404 series are monolithic PWM/PFM step–up DC to DC
converters which can automatically change operation mode from
PWM to PFM at light loads to improve efficiency at light loads. With
only four external components, this series allow a simple means to
implement highly efficient converters for powering up portable
equipment up to 350 mA loading.

Additionally, this series is featured with a Low Battery Detector to
monitor battery voltage. The NCP1404 device series are available in
space–saving TSOP–6 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.

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6

1

TSOP–6

SN SUFFIX

CASE 318G

Features

• Low Start–Up Voltage of 0.8 V

• PWM Oscillator Frequency of 600 kHz at 20% Accuracy

• High Efficiency 85% at I

• Output Current up to 350 mA at V

= 200 mA, VIN = 2.5 V, V

OUT

= 2.5 V, V

IN

= 3.3 V

OUT

OUT

• Duty Ratio: 17% to 85% typ. PWM Control

Duty Ratio: 17% typ. PFM Control

• Output Voltage Accuracy ±2.5%

• Low Battery Detection with Open–drain Detector Output

• Separated Power Supply Pin

• Low Profile and Minimum External Parts

• Micro Miniature TSOP–6

T ypical Applications

• Digital Cameras

• Cellular Telephones

• Personal Digital Assistants (PDA)

• Camcorders

• Electronic Games

• Pagers

• Portable Audio (MP3)

• Handheld Instruments

= 3.3 V

PIN CONNECTIONS AND

MARKING DIAGRAM

LBI

1

XX

OUT

2

V

3

DD

XX= Specific Device Code

d

= Date Code

See specific marking information in the ordering information
table on page 3 of this data sheet.

ORDERING INFORMATION

Device Package Shipping

NCP1404SN19T1 TSOP–6 3000/Tape & Reel
NCP1404SN27T1 TSOP–6 3000/Tape & Reel

d

(Top View)

LX

6

LBO

5

GND

4

This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.

 Semiconductor Components Industries, LLC, 2002

June, 2002 – Rev. 0

1 Publication Order Number:

NCP1404SN30T1 TSOP–6 3000/Tape & Reel
NCP1404SN33T1 TSOP–6 3000/Tape & Reel
NCP1404SN50T1 TSOP–6 3000/Tape & Reel

NCP1404/D

NCP1404 Series

OUT

GND

0.8 V to 3.0 V

2

4

V

IN

C

1

10 F

VOLTAGE

REFERENCE

0.5 V

L 10 H

R

LB1

R

LB2

LBI

OUT

V

DD

LX

1

6
LBO

2

3

5

NCP1404

GND
4

SD

MBRM110LT1

Figure 1. Typical Step–Up Converter Application

DRIVER

ERROR

AMPLIFIER

V

DD

­+

SOFT–START

PWM/PFM

CONTROLLER

OSCILLATOR

0.4 V

VOLTAGE

REFERENCE

TO

MCU

V

OUT

3.3 V

C

2

10 F

LX
6

+

-

LBI
1

LBO
5

­+

V

3

DD

Figure 2. Representative Block Diagram

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2

NCP1404 Series

er 7 Inch Reel

PIN FUNCTION DESCRIPTIONS

Pin Symbol Description

1 LBI Low battery detection input pin
2 OUT Output voltage monitor pin
3 V

DD

4 GND Ground pin
5 LBO Low battery detection output pin
6 LX External inductor connection pin to power switch drain

ORDERING INFORMATION

Device Output Voltage Frequency Device Marking Package Shipping

NCP1404SN19T1 1.9 V 600 kHz DB?
NCP1404SN27T1 2.7 V 600 kHz DB?
NCP1404SN30T1 3.0 V 600 kHz DB?
NCP1404SN33T1 3.3 V 600 kHz DB?
NCP1404SN50T1 5.0 V 600 kHz DB?

Power supply pin

TSOP–6

3000 Units

per 7 Inch Reel

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.

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage (Pin 3) V
Input/Output Pins

Pin 1, Pin 2, Pin 5, Pin 6 Voltage
LX Pin Peak Sink Current I
Thermal Resistance Junction to Air R
Operating Ambient Temperature Range T
Operating Junction Temperature Range T
Storage Temperature Range T

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

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

DD

V

IO

LX

θ

JA

A

J

stg

–0.3 to 6.0 V
–0.3 to 6.0 V

1000 mA

250 C/W

–40 to + 85 C
–40 to + 125 C
–55 to +150 C

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NCP1404 Series

ELECTRICAL CHARACTERISTICS (For all values T

= 25C unless otherwise noted.)

A

Characteristic Symbol Min Typ Max Unit

OSCILLATOR

Frequency (V

OUT

= V

× 0.96) (Note 4) f

SET

OSC

480 600 720 kHz
Frequency Temperature Coefficient (TA = –40 to +85C) f – 0.11 – %/C
Maximum PWM Duty Cycle (V
PFM Duty Cycle D
Minimum Start–up Voltage (IO = 0 mA, VDD = V
Minimum Start–up Voltage Temperature Coef ficient (TA = –40 to +85C) V
Soft–Start Time (V

OUT

= V

= V

OUT

) t

SET

× 0.96) D

SET

= V

OUT

) V

SET

MAX

PFM

start

start

SS

70 78 86 %
12 17 22 %

– 0.8 0.95 V
– –1.6 – mV/C

0.3 2.0 – ms

LX (PIN 6)

Internal Switching N–Channel FET Drain Voltage V
LX On–State Current (VDD = V

OUT

= V

× 0.96, V

SET

= 0.6 V)

LX

Device Suffix: 19T1

27T1
30T1
33T1

50T1
Current Limit I
Off–State Leakage Current (VLX = 6.0 V , TA = –40 to +85C) I

LX

V

LX

LXLIM

LKG

– – 6.0 V

350
550
550
550
600

400
600
600
600
650

–
–
–
–
–

700 750 800 mA

– 0.5 1.0 mA

LBI (PIN 1)

LBI Threshold Voltage Falling V
LBI Hysteresis V
LBI Input Current I

LBI

HYS

LBI

0.396 0.400 0.404 V
– 30 – mV
– 1.5 8.0 nA

LBO (PIN 5)

LBO Low Output Voltage V
LBO Off–State Leakage Current I

LBO(low)

LBOLKG

– – 0.05 V
– 1 100 nA

TOTAL DEVICE

Supply Voltage V
Output Voltage

Device Suffix: 19T1

27T1
30T1
33T1

50T1
Output Voltage Temperature Coef ficient (TA = –40 to +85C) V
Operating Current (V
No Switching Operating Current (V

OUT

= V

SET

× 0.96, VDD = V

= V

OUT

SET

× 0.6) (Note 5) I

SET

+ 0.5 V) I

No Load Operating Current

(VDD = V

SET

× 0.6, I

= 0 mA ) (Note 7)

OUT

Maximum Output Current

(VDD = V

OUT

, VIN = V

× 0.8, Voltage Regulation < 3%)

SET

Device Suffix: 19T1

27T1

30T1

33T1

50T1

4. V

means setting of output voltage.

SET

5. Operating current is the current consumption of the device in PWM mode.

DD

V

OUT

OUT

DD1

DD2

I

DD(no load)

I

OUT

0.8 5.5 V

1.853

2.632

2.925

3.218

4.875

1.9

2.7

3.0

3.3

5.0

1.948

2.768

3.075

3.383

5.125
– 100 – ppm/C
– 220 300 A
– 40 55 A
– 65 80 A

150
300
300
300
350

200
350
350
350
400

–
–
–
–
–

6. No switching operating current is the current consumption of the device when there is no switching.

7. No load operating current is the current consumption of the device in PFM mode at no load.

mA

V

mA

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4

Other Application Circuit

NCP1404 Series

V

IN

5.0 V

33 F

MGSF1P02LT1

LBI

1

2

DD

3

MBR0520LT1

LX
6

LBO
5

NCP1404

GND
4

GND

820

R

LB1

R

LB2

OUT

V

L

To MCU
I/O Pin

++

33 F

V

3.3 V

OUT

Figure 3. Step–down Application

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5

0.05 (0.002)

NCP1404 Series

PACKAGE DIMENSIONS

TSOP–6

CASE 318G–02

ISSUE H

A

L

456

S

1

23

B

D

G

M

C

H

J

K

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD THICKNESS
IS THE MINIMUM THICKNESS OF BASE
MATERIAL.

DIM MIN MAX MIN MAX

A 0.1142 0.12202.90 3.10
B 0.0512 0.06691.30 1.70
C 0.0354 0.04330.90 1.10
D 0.0098 0.01970.25 0.50
G 0.0335 0.04130.85 1.05
H 0.0005 0.00400.013 0.100

J 0.0040 0.01020.10 0.26
K 0.0079 0.02360.20 0.60
L 0.0493 0.06101.25 1.55
M 0 10 0 10



S 0.0985 0.11812.50 3.00

INCHESMILLIMETERS

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Notes

NCP1404 Series

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NCP1404 Series

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make

changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death
may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.

PUBLICATION ORDERING INFORMATION

Literature Fulfillment:

Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA

Phone: [phone] or 800–344–3860 Toll Free USA/Canada
Fax: [phone] or 800–344–3867 Toll Free USA/Canada
Email: [e-mail]

N. American Technical Support: 800–282–9855 Toll Free USA/Canada

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JAPAN: ON Semiconductor, Japan Customer Focus Center

4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031

Phone: [phone]
Email: [e-mail]

ON Semiconductor Website: http://onsemi.com

For additional information, please contact your local
Sales Representative.

NCP1404/D

8

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