MAX17552 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Synchronous Step-Down DC-DC Converter

MAX17552
EVALUATION KIT AVAILABLE
60V, 100mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with 22µA No-Load Supply Current
General Description
The MAX17552 high-efficiency, high-voltage, syn-
chronous step-down DC-DC converter with integrated
MOSFETs operates over a 4V to 60V input voltage range.
The converter can deliver output current up to 100mA at
output voltages of 0.8V to 0.9 x V_IN. The output voltage
is accurate to within ±1.75% over the -40°C to +125°C
temperature range.
The device employs a peak-current-mode control
architecture with a MODE pin that can be used to operate
the device in pulse-width modulation (PWM) or pulse-
frequency modulation (PFM) control schemes. PWM
operation provides constant frequency operation at all
loads and is useful in applications sensitive to variable
switching frequency. PFM operation disables negative
inductor current and additionally skips pulses at light
loads for high efficiency. The converter consumes only
22µA of no-load supply current in PFM mode. The low-
resistance, on-chip MOSFETs ensure high efficiency at
full load and simplify PCB layout.
The device offers programmable switching frequency
to optimize solution size and efficiency. Programmable
soft-start allows the user to reduce the inrush currents.
An EN/UVLO pin allows the user to turn on/off the device
at the desired input-voltage level. An open-drain RESET
pin allows output-voltage monitoring. The device operates
over the -40°C to +125°C industrial temperature range
and is available in a compact 10-pin (3mm x 2mm) TDFN
and 10-pin (3mm x 3mm) μMAX^® packages. Simulation
models are available.
Applications
● Industrial Sensors and Process Control
● 4mA–20mA Current-Loop Powered Sensors
● High-Voltage LDO Replacement
● Battery-Powered Equipment
● HVAC and Building Control
● General-Purpose Point-of-Load
Benefits and Features
● Eliminates External Components and Reduces Total
Cost
• No Schottky—Synchronous Operation for High
Efficiency and Reduced Cost
• Internal Compensation
• Fixed Internal 5.1ms or Programmable Soft-Start
• All-Ceramic Capacitors, Ultra-Compact Layout
● Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 60V Input Voltage Range
• Adjustable 0.8V to 0.9 x V_IN Output Voltages
• Delivers Up to 100mA Load Current
• 100kHz to 2.2MHz Adjustable Switching Frequency
Range with External Synchronization
• Configurable Between PFM and Forced-PWM
Modes
● Reduces Power Dissipation
• 22µA No Load Supply Current
• Peak Efficiency > 90%
• PFM Feature for High Light-Load Efficiency
• 1.2μA (typ) Shutdown Current
● Operates Reliably in Adverse Industrial Environments
• Peak Current-Limit Protection
• Built-In Output-Voltage Monitoring with Open-Drain
RESET Pin
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Output
• Overtemperature Protection
• -40°C to +125°C Industrial/Automotive Temperature
Range
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX17552.related.
19-6903; Rev 1; 6/14