MAX17541G Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 42V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

MAX17541G
42V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
General Description
The MAX17541G 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 500mA and generates output voltages from
0.9V up to 0.92 x V_IN. The feedback (FB) voltage is accurate
to within ±1.7% over -40°C to +125°C.
The MAX17541G 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
● Industrial Process Control
● HVAC and Building Control
● Base Station, VOIP, Telecom
● Home Theatre
● Battery-Powered Equipment
● General-Purpose Point of Load
Benefits and Features
● Reduces External Components and Total Cost
• No Schottky-Synchronous Operation
• All-Ceramic Capacitors, Ultra-Compact Layout
● Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 42V Input
• Adjustable 0.9V to 92%V_IN Output
• Delivers up to 500mA
● Reduces Power Dissipation
• Peak Efficiency > 90%
• Shutdown Current = 0.9μA (typ)
● 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.
MAX17541G Application Circuit (5V Output, 500mA Maximum Load Current)
VIN
C1
R1
1µF
3.32MΩ
1
JU1 2
3
R2
681k
C2
1µF
C3
3300pF
R3
C9
21.5kΩ
22pF
C5
3300pF
L1
47µH
VIN
LX
EN/UVLO
PGND
MAX17541G
GND
VCC
FB/VO
SS
COMP
RESET
L1 = 74404054470 OR
XFL6060-473
RESET
C4
10µF
VOUT
5V, 500mA
R4
82.5kΩ
R5
18.2kΩ
19-7672 Rev 0; 6/15