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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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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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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