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www.rohm.com
2010.05 - Rev.
© 2010 ROHM Co., Ltd. All rights reserved.
High Performance Regulators for PCs
Nch FET Ultra LDO
for PC Chipsets
BD3507HFV
●Description
The BD3507HFV is suited for power supply for chipset bus. Though small in size, BD3507HFV adopts power PKG with
radiation fins, and it therefore can be used for a regulator up to 550mA. Because it adopts Nch MOSFET and can form a
ultra LDO power supply of R
ON
=300m (TYP), BD3507HFV can compose a high-efficiency system, though it is of a linear
type power supply. The output voltage can be set by VREF terminal and can be synchronized with other power supply.
In addition, it can be used as a high side switch (R
ON
= 300m/lo = 550mA) of low-voltage power supply line.
Because ceramic capacitors can be used for output capacitors, BD3507HFV contributes to downsizing and reduced
thickness not only of IC but also of sets.
●Features
1) Built-in high-accuracy buffer circuit (can be set to 0.65-2.7V)
2) Adoption of ceramic capacitors
3) Built-in enable function (0A at standby)
4) Built-in current limiting circuit (550mA Max)
5) Built-in under voltage lockout circuit (UVLO)
6) Built-in thermal shutdown circuit (TSD)
7) Adoption of ultra-small-size high-power HVSOF6 package (3.0 x 1.6 x 0.75 mm)
●Applications
Notebook PC, desktop PC, digital camera, digital home appliances
●Absolute Maximum Ratings (Ta=25℃)
Parameter Symbol Ratings Unit
Input Voltage1 V
CC
6.0
*1 *2
V
Input Voltage2 V
IN
6.0
*1 *2
V
Enable Input Voltage V
EN
6.0
*1 *2
V
Power Dissipation1 Pd1 512.5
*3
mW
Power Dissipation2 Pd2 850.0
*4
mW
Operating Temperature Range Topr -10～+100 ℃
Storage Temperature Range Tstg -55～+150 ℃
Maximum Junction Temperature Tjmax +150 ℃
*1 However, not exceeding Pd.
*2 Maximum rating that can stand instantaneous voltage application such as surge, back EMF, or continuous pulse application whose duty ratio lowers 10%.
*3 In the case of Ta25°C (when mounting to 70mmx70mmx1.6mm glass epoxy substrate), derated at 4.1 mW/°C.
*4 In the case of Ta25°C (when mounting to 70mmx70mmx1.6mm glass epoxy substrate (copper foil area: 100 mm
2
)), derated at 6.8 mW/°C.
●Operating Conditions (Ta=25℃)
Parameter Symbol
Ratings
Unit
MIN MAX
Input Voltage1 V
CC
4.5 5.5 V
Input Voltage2 V
IN
1.2 Vcc-1 V
VREF Setup Voltage V
REF
0.65 2.7 V
EN Input Voltage V
EN
-0.3 5.5 V
Output Current I
O
0 550 mA
★ No radiation-resistant design is adopted for the present product.
No.10030EAT31
