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Major Power Technology

MA5603 Datasheet Preview

MA5603 Datasheet

38V Synchronous Buck

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MA5603 (Preliminary)
38V Synchronous Buck for LED Driver
GENERAL DESCRIPTION
The MA5603 is a monolithic synchronous buck regulator, and step-down converter designed
for driving up to 10 series white LEDs from a 38V system input. The total LED driving current up
to 2.5A , which is measured through an external current sense resistor. Its low 200mV feedback
voltage reduces power loss and improves efficiency. The MA5603 includes current limit, short
circuit protection and thermal shutdown protection preventing damage.
An internal soft-start prevents inrush current at turn-on, This device, available in an
SOP8L-EP(Exposed pad) package, provides a very compact solution with minimal external
components.
FEATURES
- Wide 8V to 38V Operating Input Range
- Integrated two 140mΩ Power MOSFET Switches
- Feedback Voltage : 200mV
- Internal Soft-Start / VFB Over Voltage Protection
- Stable with Low ESR Ceramic Output Capacitors
- Fixed 240KHz Frequency
- Current Limit , Thermal Shutdown and Short Circuit Protections (SCP).
- Input Under/Over Voltage Lockout
APPLICATION CIRCUIT
ILED=VFB /RSET=0.2V/0.6Ω=0.330A , VFB = 0.2V.
Major Power Technology Co., Ltd.
1/6
Rev.0.2 Jul.16, 2014




Major Power Technology

MA5603 Datasheet Preview

MA5603 Datasheet

38V Synchronous Buck

No Preview Available !

MA5603 (Preliminary)
PIN ASSIGNMENT
The package of MA5603 is SOP8L-EP(Exposed pad); the pin assignment is given by:
Name
Description
BS
Boot-Strap Pin. Supply high side gate driver. Decouple this pin to LX pin with 24ohm +
0.1uF ceramic cap.
IN
Power Input pin. Bypass IN to GND with a suitably large capacitor to eliminate noise on
the input to the IC.
SW
Power Switching Output. SW is the switching node that supplies power to the output.
Connect the output LC filter from SW to the output load.
GND Ground.
PAD Ground (Connect to GND).
FB
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage.
COMP
Compensation Node. COMP is used to compensate the regulation control loop. Connect
a series RC network from COMP to GND to compensate the regulation control loop.
EN Enable control. Pull high to turn on. Do not float.
VDD Internal regulator pin
RDER/MARKING INFORMATION
Order Information
Top Marking (SOP-8L)
Major Power Technology Co., Ltd.
2/6
Rev.0.2 Jul.16, 2014


Part Number MA5603
Description 38V Synchronous Buck
Maker Major Power Technology
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MA5603 Datasheet PDF






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