MA5605
36V 4.5A Synchronous Buck Converter With 2CH CC/CV
GENERAL DESCRIPTION
The MA5605 is a monolithic synchronous buck regulator. The device integrates internal high
side and external low side power MOSFETs, and provides 4.5A of continuous load current over a
wide input voltage. Current mode control provides fast transient response and cycle-by-cycle
current limit.
An internal soft-start prevents inrush current at turn-on, this device available in SOP8L-EP
(Exposed pad) package, and provides a very compact solution with minimal external components.
FEATURES
- Wide 8V to 36V Operating Input Range
- Integrated 75mΩ high side Power MOSFET Switches
- Output Adjustable : VFB(1.00V±2%) .
- Up to 95% Efficiency
- Internal Soft-Start and Fixed 160KHz Frequency
- Stable with Low ESR Polymer Al-E-Capacitors
- Cycle-by-Cycle Over Current Protection
- Input Under/Over Voltage Lockout
APPLICATION CIRCUIT
VIN=8~32V
C1
220μF
35V
C6 R5 C5
0.1μF 24Ω 10nF
C7
10μF
35V IN
BS
L1
MA5605 SW
33μH
PAD(GND)
40N04S
GND LG NMOS
CS2 CS1
FB
M1
R1
40kΩ
R2
10kΩ
VOUT=5V
CFB
3.3nF
C2
470μF
16V
C8 5V 2.4A 5V 1.0A
10μF VOUT1- VOUT2-
10V
RSEN RSEN
38mΩ 80mΩ
VOUT=VFB × (1+R1/R2), VFB = 1.00V, R2 suggest 1k~40KΩ
ISEN = 2.63A (ISEN=VCS1(0.1V) / RSEN(38mΩ))
Major Power Technology Co., Ltd.
1/9
Rev.1.2 Apr. 12, 2017
