MAX17532 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – Wide 4V to 42V Input

MAX17532
EVALUATION KIT AVAILABLE
42V, 100mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with 22µA No-Load Supply Current
General Description
The MAX17532 high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated MOSFETs
operates over a 4V to 42V input. The converter can deliv-
er up to 100mA and generates output voltages from 0.8V
up to 0.9 x V_IN. The feedback (FB) voltage is accurate to
within ±1.75% over -40°C to +125°C.
The MAX17532 uses peak-current-mode control and can
be operated in pulse-width modulation (PWM) or pulse
frequency modulation (PFM) modes.
The device is available in a 10-pin (3mm x 2mm) TDFN
and 10-pin (3mm x 3mm) μMAX^® packages. Simulation
models are available.
Applications
●● Industrial Sensors and Process Control
●● High-Voltage LDO Replacement
●● Battery-Powered Equipment
●● HVAC and Building Control
Ordering Information appears at end of data sheet.
Benefits and Features
●● Reduces External Components and Total Cost
• No Schottky–Synchronous
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
• All-Ceramic Capacitors, Compact Layout
●● Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 42V Input
• Adjustable 0.8V to 0.9 x VIN Output
• 100kHz to 2.2MHz Adjustable Switching Frequency
with External Synchronization
●● Reduces Power Dissipation
• 22μA Quiescent Current
• Peak Efficiency > 90%
• PFM Enables Enhanced Light-load Efficiency
• 1.2μA Shutdown Current
●● Operates Reliably in Adverse Environments
• Peak Current Limit Protection
• Built-In Output Voltage Monitoring RESET
• Programmable EN/UVLO Threshold
• Monotonic Startup Into Prebiased Load
• Overtemperature Protection
• -40°C to +125°C Operation
Typical Application Circuits—High-Efficiency 5V, 100mA Regulator
V_IN
6V TO 42V
C_IN
1µF
R3
191kΩ
IN
LX
MAX17532
EN/UVLO
SS
GND
V_OUT
MODE
FB
RT/SYNC
RESET
L1
220µH
V_OUT
5V, 100mA
C_OUT
10µF
R4
22.1Ω
C1
0.22µF
R1
261kΩ
R2
49.9kΩ
SWITCHING FREQUENCY = 220kHz
L1 COILCRAFT LPS5030-224M
C_OUT MURATA 10µF/X7R/6.3V/1206 (GRM31CR70J106K)
C_IN MURATA 1μF/X7R/50V/0805 (GRM21BR71H105K)
µMAX is a registered trademark of Maxim Integrated Products, Inc.
19-7436; Rev 1; 3/15