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PDF BL9310 Data sheet ( Hoja de datos )

Número de pieza BL9310
Descripción 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
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BL9310 pdf
BL9310
1.5 MHz, 1A Synchronous Buck Converter
Typical Performance Characteristics
(Test Figure 1 above unless otherwise specified)
Output Voltage vs. Load Current
2.2
VIN=3.6V
2.1 TA=25°C
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
0
200 400 600 800 1000
Load Current(mA)
1200
90
80
70
60
50
40
30
20
Efficiency vs. Output Current
Vin=2.7V
Vin=3.6V
Vin=4.2V
10 100
Output Current (mA)
1000
Reference Voltage vs. Temperature
0.606
VIN=3.6V
0.605
0.604
0.603
0.602
-50
-25
0 25 50 75
TemperatureC)
100 125
Supply Current vs. Supply Voltage
245
240 VOUT=1.8V
ILOAD=0A
235 TA=25°C
230
225
220
215
210
205
200
195
2
3
4
Supply Voltage(V)
5
6
Output Voltage vs. Input Voltage
1.820
ILOAD=10mA
1.815 ILOAD=100mA
ILOAD=600mA
1.810
1.805
1.800
1.795
1.790
1.785
1.780
2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7
VIN(V)
Start_up from Shutdown
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
5

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BL9310 arduino
BL9310
1.5 MHz, 1A Synchronous Buck Converter
TSOT-23-5 Surface Mount Package
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
11

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