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PDF BD9B331GWZ Data sheet ( Hoja de datos )
| Número de pieza | BD9B331GWZ | |
| Descripción | Single Synchronous Buck DC/DC Converter | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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2.7V to 5.5V Input ,3A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9B331GWZ
General Description
ROHM’s high efficiency switching regulator,
BD9B331GWZ, is a step-down converter designed to
produce a low voltage output of 0.6V~3.3V from a
2.7V~5.5V power supply line. It offers high efficiency in
all load ranges by automatic PFM/PWM adjustment. It
employs an On time control system to provide faster
transient response to sudden change in load.
Features
Fast transient response with On time control system.
High efficiency for all load range with synchronous
rectifier (Nch/Nch FET) and adaptive PFM/PWM
system.
Adjustable Soft-start function.
Thermal and UVLO protection.
Short-circuit current protection with pulse count
Shutdown function.
Key Specifications
Input Voltage Range:
2.7V to 5.5V
Output Voltage Range:
0.6V to PVCC×0.8V
Output Current:
3.0A (Max)
Switching Frequency:
1.3MHz(Typ)
High Side FET ON Resistance:
23mΩ(Typ)
Low Side FET ON Resistance:
23mΩ(Typ)
Standby Current:
0µA (Typ)
Operating Temperature Range: -40°C to +85°C
Package(s)
UCSP30L1:
W(Typ) x D(Typ) x H(Max)
1.98mm x 1.80mm x 0.33mm
Applications
Power supply for LSI including SoC, DSP,
Micro computer and ASIC
Laptop PC / Tablet PC / Server
LCD TV, Storage Devices (HDD / SSD)
Printer
Amusement
Secondary power supply
.
UCSP30L1
Typical Application Circuit(s)
VIN
CIN
EN
CSS
PVCC
AVCC
EN
BD9B331GWZ
SS
PGD
BST
SW
FB
RES
AGND
PGND
CBST
L
PGD
VOUT
COUT
Figure 1. Typical Application Circuit
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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1 page  
BD9B331GWZ
Typical Performance Curves
SW pin
2V/div
VOUT
50mV/div
Iinductor
0.3A/div
VIN =3.3V
VOUT=0.9V
L =1µH
0.5µs/div
SW pin
2V/div
VOUT
50mV/div
Iinductor
0.3A/div
Datasheet
VIN =3.3V
VOUT =0.9V
L =1µH
0.5µs/div
Figure 4. PFM operation, load 0mA
Figure 5. PFM operation, load 100mA
SW pin
2V/div
VOUT
50mV/div
Iinductor
0.3A/div
VIN =3.3V
VOUT =0.9V
L =1µH
0.5µs/div
SW pin
2V/div
VOUT
50mV/div
Iinductor
0.3A/div
VIN =3.3V
VOUT =0.9V
L =1µH
0.5µs/div
Figure 6. PWM operation, load 500mA
Figure 7. PWM operation, load 1000mA
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
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TSZ02201-0J3J0AJ00810-1-2
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5 Page 
BD9B331GWZ
Typical Performance Curves - continued
0.910
0.905
0.900
0.895
VIN =3.3V
VOUT =0.9V/1A
L =1µH
0.890
-40
-20
0
20 40 60 80
TEMPERATURE : Ta [℃]
Figure 27. Output variation (ambient temperature)
Datasheet
1.2
1.0
0.8
0.6
0.4
VIN =3.3V
VOUT =0.9V
0.2 L =1µH
0.0
0 24 68
OUTPUT CURRENT : IOUT [A]
Figure 28. OCP detection current
10
340
320
300
280
260
240
220
200
0
VIN =3.3V
VOUT =0.9V
L=1µH
1000
2000
OUTPUT CURRENT : IOUT [mA]
3000
Figure 29. On time v.s. OUTPUT CURRENT
2.5
2.0
1.5
1.0
0.5
0.0
0
VIN =3.3V
VOUT =0.9V
L=1µH
1000
2000
OUTPUT CURRENT : IOUT [mA]
3000
Figure 30. Frequency v.s. OUTPUT CURRENT
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/27
TSZ02201-0J3J0AJ00810-1-2
27.MAY.2015 Rev.002
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD9B331GWZ.PDF ] | |
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