MAX17530
42V, 25mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with 22µA No-Load Supply Current
General Description
Features and Benefits
● Reduces External Components and Total Cost
The
MAX17530
high-efficiency,
high-voltage,
synchronous step-down DC-DC converter with integrated
MOSFETs operates over a 4V to 42V input. The converter
can deliver up to 25mA and generates output voltages
• No Schottky–Synchronous
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
• All-Ceramic Capacitors, Compact Layout
from 0.8V up to 0.9 x V . The feedback (FB) voltage is
IN
accurate to within ±1.75% over -40°C to +125°C.
● Reduces Number of DC-DC Regulators to Stock
The MAX17530 uses peak-current-mode control. The
device can be operated in pulse-width modulation (PWM)
or pulse-frequency modulation (PFM) modes.
• Wide 4V to 42V Input
• Adjustable 0.8V to 0.9 x V Output
• 100kHz to 2.2MHz Adjustable Switching Frequency
with External Synchronization
IN
The device is available in a 10-pin (3mm x 2mm) TDFN
®
and 10-pin (3mm x 3mm) μMAX packages. Simulation
● Reduces Power Dissipation
• 22µA Quiescent Current
models are available.
• Peak Efficiency > 90%
• PFM Enables Enhanced Light-Load Efficiency
• 1.2µA Shutdown Current
Applications
● Industrial Sensors and Process Control
● High-Voltage LDO Replacement
● Battery-Powered Equipment
● Operates Reliably in Adverse Environments
• Peak Current-Limit Protection
● HVAC and Building Control
• Built-In Output-Voltage Monitoring RESET
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Load
• Overtemperature Protection
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
• -40°C to +125°C Operation
Typical Application Circuits—High-Efficiency 5V, 25mA Regulator
L1
1m
V
V
OUT
5V, 25mA
IN
H
6V TO 42V
IN
LX
C
IN
F
C
10µF
MAX17530
OUT
1
µ
EN/UVLO
GND
R4
22.1
SS
Ω
V
OUT
FB
C1
0.22
R1
261k
µ
F
MODE
Ω
RT/SYNC
R2
49.9k
Ω
R3
191k
L1 COILCRAFT LPS5030-105M
Ω
C
MURATA 10µF/X7R/6.3V/0805 (GRM21BR70J106K)
MURATA 1μF/X7R/50V/1206 (GRM31MR71H105K)
RESET
OUT
C
IN
19-7381; Rev 0; 11/14