Compact Variable Output Secondary LDO Regulators

OverviewKey Feature 1Key Feature 2Key Feature 3Lineup

ROHM expands its lineup of LDO regulators for consumer electronics

Overview

ROHM's variable output secondary LDO regulators are designed to provide localized power to a variety of controllers and devices, including CPUs and DSPs. 9 models are offered in different input voltages (7V/10V/15V) and output currents (0.3A/0.5A/1.0A/1.5A). In addition, a backside metal fin is attached that dissipates heat through the board, resulting in high package power in a compact form factor equivalent in size to the SOP8. Additional features include a built-in MOSFET, soft start function, high-speed load response, and compatibility with compact ceramic capacitors. Package HTSOP-J8

Key Features

  • 3 different max. input voltage levels: 7V, 10V, and 15V
  • 4 output currents: 0.3A, 0.5A, 1.0A, and 1.5A
  • ±1% reference voltage accuracy
  • Overcurrent protection circuit (OCP)
  • Thermal shutdown (TSD)
  • EN terminal included
  • Variable output type
  • Compact HTSOP-J8 package
  • Compatible with 1F ceramic capacitors
  • Integrated soft start function
  • Short matrix protection function
  • Entire series pin-compatible
Block Diagram

Product Lineup

Output Current Max. Input Voltage
7V 10V 15V
0.3A - BD00HA3WEFJ BD00GA3WEFJ
0.5A ☆BD00IA5WEFJ BD00HA5WEFJ BD00GA5WEFJ
1.0A ☆BD00IC0WEFJ BD00HC0WEFJ BD00GC0WEFJ
1.5A - BD00HC5WEFJ -

☆ : Under Development

Key Feature 1 :  Backside metal fin enables high heat dissipation
in a compact form factor

The new HTSOP-J8 package (SOP8-equivalent) is roughly half the size of conventional TO252-5 packages but provides high package power due to a backside metal fin, eliminating the need for thermal countermeasures such as heat sinks. New compact LDO regulators

Key Feature 2 :  Ceramic capacitor compatibility reduces mounting area

Conventional LDO regulators exhibit unstable operation when using small capacitors with low ESR due to insufficient phase margin, and therefore require large electrolytic capacitors at the output. Conversely, ROHM utilizes proprietary circuit technology and advanced circuit processes to develop LDO regulators compatible with 1F ceramic capacitors, contributing to set miniaturization and longer life.

Ceramic capacitor compatibility reduces surface mount area

Key Feature 3 :  Pin-compatible configurations (entire series)
enable flexible response to design changes

ROHM's new lineup of secondary LDO regulators - offered in a compact, high-power HTSOP package - consist of 9 models in different input voltages and output currents. The entire lineup is pin-compatible, making regulator replacement easy due to specification changes during set development.

Pin-compatible design (entire series) enables flexible response to design changes

Lineup

300mA Variable Output Secondary LDO Regulators for Local Power Supplies

Part No. Output
Voltage
(V)
Output
Voltage
Accuracy
(%)
Output
Current
(A)
Voltage
Resistance
(V)
Ripple
Rejection
(dB)
Bias
Current
(mA)
Input
Voltage
Difference
(V)
Load
Regulation
(mV)
Input
Capacitor
(F)
Output
Capacitor
(F)
Shutdown
Switch
Protection
Circuits
Package
New BD00HA3WEFJ Variable
1.5 to 7.0
±1.0 0.3 10 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
300mA)
25
(lo=
0 to
300mA)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
New BD00GA3WEFJ Variable
1.5 to 13.0
±1.0 0.3 15 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
300mA)
25
(lo=
0 to
300mA)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
500mA Variable Output Secondary LDO Regulators for Local Power Supplies
Part No. Output
Voltage
(V)
Output
Voltage
Accuracy
(%)
Output
Current
(A)
Voltage
Resistance
(V)
Ripple
Rejection
(dB)
Bias
Current
(mA)
Input
Voltage
Difference
(V)
Load
Regulation
(mV)
Input
Capacitor
(F)
Output
Capacitor
(F)
Shutdown
Switch
Protection
Circuits
Package

BD00IA5WEFJ
Variable 0.8 to 4.5 ±1.0 0.5 7 60
(f=100Hz,
50mVpp,
Io=0A)
0.3 0.6
(lo=
0.5A)
25
(lo=
0 to
500mA)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
New BD00HA5WEFJ Variable
1.5 to 7.0
±1.0 0.5 10 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
0.5A)
25
(lo=
0 to
500mA)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
New BD00GA5WEFJ Variable
1.5 to 13.0
±1.0 0.5 15 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
0.5A)
25
(lo=
0 to
500mA)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8

☆ : Under Development

1A Variable Output Secondary LDO Regulators for Local Power Supplies

Part No. Output
Voltage
(V)
Output
Voltage
Accuracy
(%)
Output
Current
(A)
Voltage
Resistance
(V)
Ripple
Rejection
(dB)
Bias
Current
(mA)
Input
Voltage
Difference
(V)
Load
Regulation
(mV)
Input
Capacitor
(F)
Output
Capacitor
(F)
Shutdown
Switch
Protection
Circuits
Package

BD00IC0WEFJ
Variable
0.8 to 4.5
±1.0 1.0 7 60
(f=100Hz,
50mVpp,
Io=0A)
0.3 0.6
(lo=
1A)
25
(lo=
0 to
1A)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
New BD00HC0WEFJ Variable
0.8 to 7.0
±1.0 1.0 10 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
1A)
25
(lo=
0 to
1A)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8
New
BD00GC0WEFJ
Variable
1.5 to 13.0
±1.0 1.0 15 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
1A)
25
(lo=
0 to
1A)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8

☆: Under Development

1.5A Variable Output Secondary LDO Regulators for Local Power Supplies

Part No. Output
Voltage
(V)
Output
Voltage
Accuracy
(%)
Output
Current
(A)
Voltage
Resistance
(V)
Ripple
Rejection
(dB)
Bias
Current
(mA)
Input
Voltage
Difference
(V)
Load
Regulation
(mV)
Input
Capacitor
(F)
Output
Capacitor
(F)
Shutdown
Switch
Protection
Circuits
Package
New
BD00HC5WEFJ
Variable
1.5 to 7.0
±1.0 1.5 10 60
(f=100Hz,
50mVpp,
Io=0A)
0.6 0.9
(lo=
1.5A)
25
(lo=
0 to
1.5A)
1.0 1.0 Yes Overcurrent/
Thermal
Shutdown
HTSOP-J8

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