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Rohm Semiconductor Electronic Components Datasheet

BD9G102G-LB Datasheet

Simple Buck Converter Integrated FET

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6V to 42V, 0.5A 1ch
Simple Buck Converter Integrated FET
BD9G102G-LB
General Description
This is the product guarantees long time support in
Industrial market.
The BD9G102G-LB is a 42V, 0.5A non-synchronous
buck converter with integrated internal high-side 42V
Power MOSFET. Operating frequency is 1.0MHz fixed by
inner circuit. The components of phase compensation
are built in. Additional protection features are included
such as Over Current Protection, Thermal Shutdown and
Under Voltage Lockout.
Features
Long Time Support Product for Industrial
Applications.
Wide Operating Input Range 6V to 42V
45V/800m Internal Power MOSFET
1.0MHz Fixed Operating Frequency
Feedback Pin Voltage 0.75V ± 2.0%
Accurate EN Threshold 1.8V ± 0.1V
Current Mode
Internal Compensation
Cycle-by-Cycle Over Current Protection(OCP)
Under Voltage Locked Out(UVLO), Over Voltage
Protection(OVP), Thermal Shut Down(TSD)
0μA Low Shutdown Supply Current
Key Specifications
Input Voltage Range:
Ref. Precision (Ta=25):
Max Output Current:
Switching Frequency:
Shutdown Current:
Operating Temperature:
6V to 42 V
±2.0 %
0.5A (Max)
1.0MHz (Typ)
0μA (Typ)
-40°C to +85°C
Package
SSOP6
W(Typ) x D(Typ) x H(Max)
2.90mm x 2.80mm x 1.25mm
SSOP6
Applications
Industrial Equipment
Battery Powered Equipment
OA Instrument
Typical Application Circuit
C3: 0.1μF
BST
LX
GND VCC
R2: R1:
12k 68k
FB
EN
L1:22μH
D1
C1
C2 :
22μF
VCC
R3
R4
5V/0.5A
Figure 1. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2017 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
1/27
TSZ02201-0252AAJ00100-1-2
29.Sep.2017 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD9G102G-LB Datasheet

Simple Buck Converter Integrated FET

No Preview Available !

BD9G102G-LB
Pin Configuration
BST 1
GND 2
FB 3
6 LX
5 VCC
4 EN
Pin Description
Pin No. Pin Name
1 BST
Figure 2. Pin Configuration (TOP VIEW)
Description
The pin is power supply for floating Power NMOS driver. Connect bypass capacitor between
the pin and LX pin for bootstrap operation. A 0.1μF ceramic capacitor is recommended.
2
GND
Ground.
3
FB
Voltage feedback pin. This pin is error-amp negative input. This pin voltage is set to 0.75V in
application.
4
EN
The BD9G102G-LB is shut down when this pin is smaller than 0.5 V and non-switching mode
when this pin is between 0.5 V and 1.8 V, active when this pin is 1.8V or more.
5
VCC
Input supply. Place bypass capacitor as close as possible to this pin.
6
LX
Power FET switch output. Place schottky barrier diode and inductor as close as possible to
this pin.
Block Diagram
ON/OFF
EN
STANBY
10μA
1.8V +-
TSD
UVLO
Reference
REG
VREF Current Sense
AMP
shutdown
FB
-
0.75V
+
+
Error
AMP
Soft
Start
Current
Comparator
-
Σ+
R  Q
S  
 
Oscillator
1.0MHz
Logic
Controll
VCC
BST
800mΩ
LX
20Ω
GND
VOUT
Figure 3. Block Diagram
www.rohm.com
© 2017 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/27
TSZ02201-0252AAJ00100-1-2
29.Sep.2017 Rev.001


Part Number BD9G102G-LB
Description Simple Buck Converter Integrated FET
Maker ROHM
Total Page 30 Pages
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