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Rohm Semiconductor Electronic Components Datasheet

BD9A100MUV Datasheet

2.7V to 5.5V Input 1A Integrated MOSFET Single Synchronous Buck DC/DC Converter

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Datasheet
2.7V to 5.5V Input, 1A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9A100MUV
General Description
BD9A100MUV is a synchronous buck switching
regulator with built-in low on-resistance power MOSFETs.
It is capable of providing current up to 1A.The SLLMTM
control provides excellent efficiency characteristics in
light-load conditions which make the product ideal for
equipment and devices that demand minimal standby
power consumption. The oscillating frequency is high at
1MHz using a small value of inductance. It is a current
mode control DC/DC converter and features high-speed
transient response. Phase compensation can also be set
easily.
Key Specifications
Input Voltage Range:
2.7V to 5.5V
Output Voltage Range:
0.8V to VPVIN×0.7V
Average Output Current:
1A(Max)
Switching Frequency:
1MHz(Typ)
High-Side MOSFET On-Resistance: 60m(Typ)
Low-Side MOSFET On-Resistance: 60m(Typ)
Standby Current:
0μA (Typ)
Package
VQFN016V3030
W(Typ) x D(Typ) x H(Max)
3.00mm x 3.00mm x 1.00mm
Features
Synchronous Single DC/DC Converter.
SLLMTM (Simple Light Load Mode) Control.
Over Current Protection.
Short Circuit Protection.
Thermal Shutdown Protection.
Under Voltage Lockout Protection.
Adjustable Soft start Function.
Power Good Output.
VQFN016V3030 Package (Backside Heat
Dissipation)
Applications
Step-Down Power Supply for DSPs,
FPGAs, Microprocessors, etc.
Laptop PCs/ Tablet PCs/ Servers.
LCD TVs.
Storage Devices (HDDs/SSDs).
Printers, OA Equipment.
Entertainment Devices.
Distributed Power Supply, Secondary Power
Supply.
Typical Application Circuit
VQFN016V3030
Figure 1. Application Circuit
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/32
TSZ02201-0J3J0AJ00610-1-2
13.Sep.2013 Rev.001
http://www.Datasheet4U.com


Rohm Semiconductor Electronic Components Datasheet

BD9A100MUV Datasheet

2.7V to 5.5V Input 1A Integrated MOSFET Single Synchronous Buck DC/DC Converter

No Preview Available !

BD9A100MUV
Pin Configuration
(TOP VIEW)
16 15 14 13
PVIN 1
PVIN 2
PGND 3
PGND 4
12 SW
11 SW
FIN
10 SW
9 SS
5678
Datasheet
Figure 2. Pin Configuration
Pin Descriptions
Pin No.
1, 2
3, 4
5
6
7
8
9
10, 11, 12
13
14
15
16
-
Pin Name
PVIN
PGND
Function
Power supply terminals for the switching regulator.
These terminals supply power to the output stage of the switching regulator.
Connecting a 10µF ceramic capacitor is recommended.
Ground terminals for the output stage of the switching regulator.
AGND
FB
ITH
MODE
SS
SW
BOOT
PGD
EN
AVIN
FIN
Ground terminal for the control circuit.
An inverting input node for the gm error amplifier.
See page 23 for how to calculate the resistance of the output voltage setting.
An input terminal for the gm error amplifier output and the output switch current comparator.
Connect a frequency phase compensation component to this terminal.
See page 24 for how to calculate the resistance and capacitance for phase compensation.
Turning this terminal signal Low (0.2V or lower) forces the device to operate in the fixed
frequency PWM mode. Turning this terminal signal High (0.8V or higher) enables the SLLM
control and the mode is automatically switched between the SLLM control and fixed frequency
PWM mode.
Terminal for setting the soft start time. The rise time of the output voltage can be specified by
connecting a capacitor to this terminal. See page 23 for how to calculate the capacitance.
Switch nodes. These terminals are connected to the source of the high-side MOSFET and drain
of the low-side MOSFET. Connect a bootstrap capacitor of 0.1µF between these terminals and
BOOT terminals. In addition, connect an inductor of 2.2µH considering the direct current
superimposition characteristic.
Connect a bootstrap capacitor of 0.1µF between this terminal and SW terminals.
The voltage of this capacitor is the gate drive voltage of the high-side MOSFET.
A “Power Good” terminal, an open drain output. Use of pull up resistor is needed. See page 18
for how to specify the resistance. When the FB terminal voltage reaches within ±7% of 0.8V
(Typ), the internal Nch MOSFET turns off and the output turns High.
Turning this terminal signal low (0.8V or lower) forces the device to enter the shutdown mode.
Turning this terminal signal high (2.0V or higher) enables the device. This terminal must be
terminated.
Supplies power to the control circuit of the switching regulator.
Connecting a 0.1µF ceramic capacitor is recommended.
A backside heat dissipation pad. Connecting to the internal PCB ground plane by using multiple
vias provides excellent heat dissipation characteristics.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
2/32
TSZ02201-0J3J0AJ00610-1-2
13.Sep.2013 Rev.001
http://www.Datasheet4U.com


Part Number BD9A100MUV
Description 2.7V to 5.5V Input 1A Integrated MOSFET Single Synchronous Buck DC/DC Converter
Maker ROHM
Total Page 30 Pages
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