BL9310 Datasheet, PDF (1/11 Pages) SHANGHAI BELLING CO., LTD. – 1.5 MHz, 1A Synchronous Buck Converter

BL9310
1.5 MHz, 1A Synchronous Buck Converter
FEATURES
• High Efficiency: Up to 96%
• 1.5MHz Constant Switching Frequency
• Current Mode Operation for Excellent
Line and Load Transient Response
• No Schottky Diode Required
• 2.5V to 5.5V Input Voltage Range
• 1.0V,1.2V,1.5V,1.8V,2.5V and 3.3V
Fixed/Adjustable Output Voltage
• 100% Duty Cycle in Dropout Mode
• Low Quiescent Current: 200µA
• Over temperature Protection
• Short Circuit Protection
• Shutdown Quiescent Current < 1µA
• Space Saving 5-Pin Thin SOT23 Package
APPLICATIONS
• Cellular and Smart Phones
• Wireless Handsets and DSL Modems
• Microprocessors and DSP Core Supplies
• PDAs
• Digital Still and Video Cameras
• MP3/MP4/MP5 Players
ORDERING INFORMATION
BL9310 –XX X XXX
： Package
TRN: TSOT23-5
RN: SOT23-5
Features:
P: Standard (default,
lead free)
C: Customized
： Output Voltage
10: 1.0V
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
33: 3.3V
AD: Adjustable
• Portable Instruments
• GPS Receivers
DESCRIPTION
The BL9310 is a constant frequency, 1.5MHz,
slope compensated current mode PWM step-
down converter working under an input
voltage range of 2.5V to 5.5V. This feature
makes the BL9310 suitable for single cell Li-
ion battery-powered applications. The internal
synchronous rectifier is desired to increase
efficiency without an external Schottky diode.
100% duty cycle capability extends battery
life in portable devices, while the quiescent
current is 200µA at no load, and drops to <
1µA in shutdown. Pulse Skipping Mode
operation increases efficiency at light loads,
further extending battery life. The BL9310 is
offered in a low profile (1mm) 5-pin, thin
SOT23 package, and is available in an
adjustable version and fixed output versions
of 1.0V, 1.2V, 1.5V , 1.8V, 2.5V and 3.3V.
TYPICAL APPLICATION
Figure 1. BL9310-ADJ Typical Application Circuit
PPMIC BU
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BL9310 Rev 1.1
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1/2011
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