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BD9B301MUV-LB 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BD9B301MUV-LB은 전자 산업 및 응용 분야에서
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부품번호 BD9B301MUV-LB 기능
기능 Single Synchronous Buck DC/DC Converter
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BD9B301MUV-LB 데이터시트, 핀배열, 회로
Datasheet
2.7V to 5.5V Input, 3.0A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9B301MUV-LB
General Description
This is the product guarantees long time support in
Industrial market.
BD9B301MUV-LB is a synchronous buck switching
regulator with built-in low on-resistance power MOSFETs.
This IC, which is capable of providing current up to 3A,
features fast transient response by employing constant
on-time control system. It offers high oscillating
frequency at low inductance. With its original constant
on-time control method which operates low consumption
at light load, this product is ideal for equipment and
devices that demand minimal standby power
consumption.
Key Specifications
Input Voltage Range:
2.7V to 5.5V
Output Voltage Range: 0.8 V to VPVIN x 0.8 V
Maximum Operating Current:
3A (Max)
Switching Frequency:
2MHz/1MHz (Typ)
High-Side MOSFET ON Resistance: 35m(Typ)
Low-Side MOSFET ON Resistance: 35m(Typ)
Standby Current:
0μA (Typ)
Package
VQFN016V3030
W (Typ) x D (Typ) x H (Max)
3.00 mm x 3.00 mm x 1.00 mm
Features
Long Time Support Product for Industrial
Applications
Synchronous Single DC/DC Converter
Constant on-time control suitable to Deep-SLLM
Over Current Protection
Short Circuit Protection
Thermal Shutdown Protection
Under Voltage Lockout Protection
Adjustable Soft Start
Power Good Output
VQFN016V3030 Package
(Backside Heat Dissipation)
VQFN016V3030
Applications
Industrial Equipment
Step-down Power Supply for DSPs, FPGAs,
Microprocessors, etc.
Storage Devices (HDDs/SSDs)
Printers, OA Equipment
Distributed Power Supply, Secondary Power Supply
Typical Application Circuit
Figure 1. Application Circuit
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
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TSZ02201-0J3J0AJ00830-1-2
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BD9B301MUV-LB pdf, 반도체, 판매, 대치품
BD9B301MUV-LB
Datasheet
Description of Blocks
VREF
The VREF block generates the internal reference voltage.
UVLO
The UVLO block is for Under Voltage lockout protection. It will shut down the IC when VIN falls to 2.45 V (Typ) or
lower. The threshold voltage has a hysteresis of 100mV (Typ).
TSD
The TSD block is for thermal protection. The thermal protection circuit shuts down the device when the internal
temperature of IC rises to 175°C (Typ) or higher. Thermal protection circuit resets when the temperature falls. The
circuit has a hysteresis of 25°C (Typ).
Soft Start
The Soft Start circuit slows down the rise of output voltage during start-up and controls the current, which allows the
prevention of output voltage overshoot and inrush current. A built-in soft start function is provided and a soft start is
initiated in 1msec (Typ) when the SS terminal is open.
Control Logic + DRV
This block is a DC/DC driver. A signal from On Time is applied to drive the MOSFETs.
PGOOD
When the FB terminal voltage reaches more than 80% of 0.8 V, the Nch MOSFET of the built-in open drain output
turns off and the output turns High.
OCP/SCP
After soft start is completed and in condition where output voltage is below 70% (Typ) of voltage setting, it counts the
number of times of which current flowing in High side FET reaches over current limit. When 512 times is counted it
stops operation for 1m sec (Typ) and re-operates. Counting is reset when output voltage is above 80% (Typ) of
voltage setting or when EN, UVLO, SCP function is re-operated.
Error Amplifier
Adjusts Main Comparator input to make internal reference voltage equal to FB terminal voltage.
Main Comparator
Main comparator compares Error Amplifier output and FB terminal voltage. When FB terminal voltage becomes low it
outputs High and reports to the On Time block that the output voltage has dropped below control voltage.
On Time
This is a block which creates On Time. Requested On Time is created when Main Comparator output becomes High.
On Time is adjusted to restrict frequency change even with input and output voltage change.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
4/30
TSZ02201-0J3J0AJ00830-1-2
2015.04.02 Rev.001

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BD9B301MUV-LB 전자부품, 판매, 대치품
BD9B301MUV-LB
Typical Performance Curves
Datasheet
60
50
VIN=5V
40
30 VIN=3.3V
20
10
0
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Figure 4. Operating Supply Current vs Temperature
3.0
2.5
2.0
1.5
1.0
VIN=5V
0.5
VIN=3.3V
0.0
-40 -20 0 20 40 60 80 100 120
Temperature [°C]
Figure 5. Stand-by Supply Current vs
Temperature
100
MODE=L
90
80
70
60
50
40 MODE=H
30
20
10
0
1
VOUT=1.2V,
FREQ=L
10 100 1000
Load Current [mA]
10000
Figure 6. Efficiency vs Load Current
(VIN=5V, VOUT=1.2V, L=1.0µH, FREQ=L)
100
MODE=L
90
80
70
60
50 MODE=H
40
30
20
10
0
1
VOUT=1.2V
FREQ=H
10 100 1000
Load Current [mA]
10000
Figure 7. Efficiency vs Load Current
(VIN=5V, VOUT=1.2V, L=1.5µH, FREQ=H)
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
7/30
TSZ02201-0J3J0AJ00830-1-2
2015.04.02 Rev.001

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부품번호상세설명 및 기능제조사
BD9B301MUV-LB

Single Synchronous Buck DC/DC Converter

ROHM Semiconductor
ROHM Semiconductor

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