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MAX17542G Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Reduces Power Dissipation | |||
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MAX17542G
42V, 1A, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
General Description
The MAX17542G high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated MOSFETs
operates over 4.5V to 42V input. The converter can
deliver up to 1A and generates output voltages from 0.9V
up to 0.92 x VIN. The feedback (FB) voltage is accurate to
within ±1.7% over -40°C to +125°C.
The MAX17542G uses peak-current-mode control with
pulse-width modulation (PWM) and operates with fixed
600kHz switching frequency at any load. The device
is available in a 10-pin (3mm x 2mm) TDFN package.
Simulation models are available.
Applications
â Industrial Process Control
â HVAC and Building Control
â Base Station, VOIP, Telecom
â Home Theatre
â Battery-Powered Equipment
â General-Purpose Point of Load
Benefits and Features
â Reduces External Components and Total Cost
⢠No Schottky-Synchronous Operation
⢠All-Ceramic Capacitors, Ultra-Compact Layout
â Reduces Number of DC-DC Regulators to Stock
⢠Wide 4.5V to 42V Input
⢠Adjustable 0.9V to 92%VIN Output
⢠Delivers up to 1A
â Reduces Power Dissipation
⢠Peak Efficiency > 90%
⢠Shutdown Current = 0.9μA (typ)
â Operates Reliably in Adverse Industrial Environments
⢠Hiccup-Mode Current Limit, Sink Current Limit,
and Autoretry Startup
⢠Built-In Output-Voltage Monitoring (RESET Pin)
⢠Programmable EN/UVLO Threshold
⢠Adjustable Soft-Start and Prebiased Power-Up
⢠-40°C to +125°C Operation
Ordering Information appears at end of data sheet.
MAX17542G Application Circuit (5V Output, 1A Maximum Load Current)
VIN
C1
2.2µF
1
JU1 2
3
R1
3.32Mâ¦
R2
681k
C2
1µF
C3
3300pF
L1
22µH
VIN
LX
EN/UVLO
PGND
MAX17542G
GND
VCC
FB/VO
SS
C4
10µF
VOUT
5V, 1A
R4
82.5kâ¦
R5
18.2kâ¦
R3
C9
16.5kâ¦
27pF
C5
4700pF
COMP
RESET
RESET
19-7531 Rev 0; 3/15
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