MAX17506 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Reduce Number of DC-DC Regulators to Stock

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 V_IN. 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 V_IN 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
RT
MODE /SYNC
VCC
VIN VIN VIN
BST
LX
SGND
MAX17506
LX
LX
CF
RESET
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
L1 = XAL8080-472
N1 = RJK0651DPB
19-7453; Rev 1; 5/15