MAX17541G
42V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
General Description
Benefits and Features
●ꢀ ReducesꢀExternalꢀComponentsꢀandꢀTotalꢀCost
• No Schottky-Synchronous Operation
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
• All-CeramicꢀCapacitors,ꢀUltra-CompactꢀLayout
●ꢀ ReducesꢀNumberꢀofꢀDC-DCꢀRegulatorsꢀtoꢀStock
0.9V up to 0.92 x V . The feedback (FB) voltage is accurate
IN
• Wide 4.5V to 42V Input
• Adjustable 0.9V to 92%V Output
to within ±1.7% over -40°C to +125°C.
IN
• Delivers up to 500mA
ReducesꢀPowerꢀDissipation
• Peak Efficiency > 90%
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.
●
• ShutdownꢀCurrentꢀ=ꢀ0.9μAꢀ(typ)
●ꢀ OperatesꢀReliablyꢀinꢀAdverseꢀIndustrialꢀEnvironmentsꢀ
• Hiccup-ModeꢀCurrentꢀLimit,ꢀSinkꢀCurrentꢀLimit,ꢀ
and Autoretry Startup
Applications
●ꢀ IndustrialꢀProcessꢀControlꢀ
●ꢀ HVACꢀandꢀBuildingꢀControlꢀ
●ꢀ BaseꢀStation,ꢀVOIP,ꢀTelecomꢀ
●ꢀ HomeꢀTheatreꢀꢀ
●ꢀ Battery-PoweredꢀEquipment
●ꢀ General-PurposeꢀPointꢀofꢀLoad
• Built-In Output-Voltage Monitoring (RESET Pin)
• ProgrammableꢀEN/UVLOꢀThreshold
• Adjustable Soft-Start and Prebiased Power-Up
• High Industrial -40°C to +125°C Ambient Operating
TemperatureꢀRange/-40°Cꢀtoꢀ+150°CꢀJunctionꢀ
TemperatureꢀRange
Ordering Information appears at end of data sheet.
MAX17541G Application Circuit (5V Output, 500mA Maximum Load Current)
L1
47µH
V
OUT
5V, 500mA
V
IN
V
LX
IN
C1
1µF
C4
R1
3.32MΩ
10µF
1
2
3
PGND
EN/UVLO
JU1
R2
681k
R4
82.5kΩ
MAX17541G
GND
V
CC
C2
1µF
FB/VO
SS
C3
R5
3300pF
18.2kΩ
COMP
RESET
RESET
R3
21.5kΩ
C9
22pF
L1 = 74404054470 OR
XFL6060-473
C5
3300pF
19-7672 Rev 1; 7/16