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MAX17506 fiches techniques PDF

Maxim Integrated - Synchronous Step-Down DC-DC Converter

Numéro de référence MAX17506
Description Synchronous Step-Down DC-DC Converter
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX17506 fiche technique
MAX17506
4.5V–60V, 5A, High-Efficiency, Synchronous
Step-Down DC-DC Converter
with Internal Compensation
General Description
The MAX17506 high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated high-side
MOSFET operates over a 4.5V to 60V input. The
converter can deliver up to 5A and generates output
voltages from 0.9V up to 0.9 x VIN. The feedback (FB)
voltage is accurate to within ±1.4% over -40°C to 125°C.
The MAX17506 uses peak current-mode control. The
device can be operated in the pulse-width modulation
(PWM), pulse-frequency modulation (PFM), and
discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (5mm x 5mm) Thin
QFN (TQFN) package. Simulation models are available.
Applications
● Industrial Power Supplies
● Distributed Supply Regulation
● Base Station Power Supplies
● Wall Transformer Regulation
● High-Voltage Single-Board Systems
● General-Purpose Point-of-Load
Ordering Information appears at end of data sheet.
Benefits and Features
Reduces External Components and Total Cost
• No Schottky-Synchronous Operation
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
All-Ceramic Capacitors, Compact Layout
Reduce Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input
• Adjustable 0.9V to 0.9 x VIN Output
100kHz to 2.2MHz Adjustable Switching Frequency
with External Synchronization
Reduces Power Dissipation
Peak Efficiency > 95%
PFM/DCM Modes Enables Enhanced Light-Load
Efficiency
Auxiliary Bootstrap LDO for Improved Efficiency
• 3.5FA Shutdown Current
Operates Reliably in Adverse Industrial Environments
Hiccup or Latchoff Mode Overload Protection
DL to LX Short Detection Feature
• Built-In Output Voltage Monitoring with RESET
Programmable EN/UVLO Threshold
Monotonic Startup into Prebiased Load
• Overtemperature Protection
• -40NC to +125NC Operation
Typical Application Circuit for 5V Output
VIN
7.5V-60V
C6
2.2μF
EN/UVLO VIN VIN VIN VIN
RT BST
MODE /SYNC
VCC LX
SGND
CF
RESET
MAX17506
LX
LX
DL
C11
0.1μF
SS PGND EXTVCC FB
C1
2.2μF
C2
2.2μF
L1
4.7μH
C8
N1 22μF
C9
22μF
C7
0.022 μF
C10
22μF
FSW = 450kHz
VOUT
5V, 5A
R3
158 k
R4
34.8k
19-7453; Rev 0; 11/14

PagesPages 19
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