MAX17501_13 Datasheet, PDF (1/22 Pages) Maxim Integrated Products – 60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

MAX17501
60V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
General Description
The MAX17501 high-efficiency, high-voltage, synchro­nous
step-down DC-DC converter with integrated MOSFETs
operates over a 4.5V to 60V input voltage range. It deliv-
ers output currents up to 500mA at output voltages of
0.9V to 92%V_IN. The output voltage is accurate to within
±1.7% over -40°C to +125°C. The MAX17501 is avail-
able in a compact TDFN package. Simulation models are
available.
The device features peak-current-mode control with
pulse-width modulation (PWM). Users can choose devic-
es with either pulse frequency modulation (PFM) or forced
PWM scheme. PFM devices skip pulses at light load for
higher efficiency, while forced-PWM devices operate with
fixed switching frequency at any load for noise sensi-
tive-applications. The low-resistance, on-chip MOSFETs
ensure high efficiency at full load and simplify the layout.
A programmable soft-start feature allows users to reduce
input inrush current. The device also incorporates an
output enable/undervoltage lockout pin (EN/UVLO) that
allows the user to turn on the part at the desired input-
voltage level. An open-drain RESET pin provides a
delayed power-good signal to the system upon achieving
successful regulation of the output voltage.
Applications
● Industrial Process Control
● HVAC and Building Control
● Base Station, VOIP, Telecom
● Home Theatre
● Automotive
● Battery-Powered Equipment
● General-Purpose Point-of-Load
Benefits and Features
● Eliminates External Components and Reduce Total
Cost
• No Schottky-Synchronous Operation for High
Efficiency and Reduced Cost
• Internal Compensation and Feedback Divider for
3.3V and 5V Outputs
• All-Ceramic Capacitors, Ultra-Compact Layout
● Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input Voltage Range
• 0.9V to 92%V_IN Output Voltage
• Delivers up to 500mA
• 600kHz and 300kHz Switching Frequency Options
• Available in a 10-Pin, 3mm x 2mm TDFN Package
● Reduces Power Dissipation
• Peak Efficiency > 90%
• PFM Feature for High Light-Load Efficiency
• Shutdown Current = 0.9μA (typ)
● Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Current Limit, Sink Current Limit,
and Autoretry Startup
• Built-In Output-Voltage Monitoring (Open-Drain
RESET Pin)
• Resistor-Programmable EN/UVLO Threshold
• Adjustable Soft-Start and Prebiased Power-Up
• -40°C to +125°C Industrial Temperature Range
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX17501.related.
19-6244; Rev 2; 1/13