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BL9310 Datasheet Preview

BL9310 Datasheet

1A Synchronous Buck Converter

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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
BL9310 Rev 1.1
1/2011
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2011 Belling All Rights Reserved
1




BELLING

BL9310 Datasheet Preview

BL9310 Datasheet

1A Synchronous Buck Converter

No Preview Available !

BL9310
1.5 MHz, 1A Synchronous Buck Converter
Absolute Maximum Rating (Note 1)
Input Supply Voltage…………………-0.3V to +6V
RUN, VFB Voltages……………………-0.3V to +VIN
SW Voltages……………………-0.3V to (VIN+0.3V)
P-Channel Switch Source Current (DC) ……1.1A
N-Channel Switch Sink Current (DC) ……1.1A
Package Information
Adjustable Output Version
Peak SW Sink and Source Current……………1.5A
Operating Temperature Range……-40°C to +85°C
Junction Temperature (Note2) ………………+125°C
Storage Temperature Range………-65°C to +150°C
Lead Temperature (Soldering, 10s) ………+300°C
Fixed Output Versions
SOT23-5
TOP VIEW
RUN 1
5 VFB
GND 2
SOT23-5
TOP VIEW
RUN 1
5 VOUT
GND 2
SW 3
4 VIN
SW 3
4 VIN
Part Number
BL9310-Adj
Top Mark
I J Y W(Note3)
Temp Range
-40°C to +85°C
Thermal Resistance (Note 4)
Package
TSOT23-5
ӨJA
220°C/W
ӨJC
110°C/W
SOT23-5
250°C/W
130°C/W
Part Number
BL9310-1.0
BL9310-1.2
BL9310-1.5
BL9310-1.8
BL9310-2.5
BL9310-3.3
Top Mark
IAYW
IBYW
ICYW
IDYW
IEYW
IFYW
Temp Range
-40°C to +85°C
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula:
TJ = TA + (PD) x (220°C/W).
Note 3: I: Product Code Y: Year of Manufacturing W: Week of Manufacturing
Note 4: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
PPMIC BU
BL9310 Rev 1.1
1/2011
www.belling.com.cn
Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
©2011 Belling All Rights Reserved
2


Part Number BL9310
Description 1A Synchronous Buck Converter
Maker BELLING
Total Page 11 Pages
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