200 mA / PFM Step-Up Micropower Switching Regulator - ON
Description
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 Vin = 2.
0 V, VOUT = 3.
0 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% (Vin = 2.
0 V, VOUT = 3.
0 V, 70 mA) • Low Operating Current of 30 mA (VOUT = 1.
9 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 • These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Cellular Telephones • Pagers • Personal Digital Assistants (PDA) • Electronic Games • Portable Audio (MP3) • Camcorders • Digital Cameras • Handheld Instruments
http://onsemi.
com
SOT23−5 (TSOP−5, SC59−5)
SN SUFFIX CASE 483
PIN CONNECTIONS AND MARKING DIAGRAM
CE 1 OUT 2
NC 3
xxxAYW G G
5 LX 4 GND
(Top View)
xxx = Marking A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location)
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