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Maxim Integrated MAX15062

60V, 300mA, Ultra-Small, High-Efficiency,Synchronous Step-Down DC-DC Converters

Overview

TopologyBuck Converter
Input voltage14-60 V
Switching frequency465-535 kHz
Output 112 V / 0.3 A
IC revision1

Description

The MAX15062 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. The converter delivers output currents up to 300mA at outputvoltages of 3.3V (MAX15062A) and 5V (MAX15062B). The device operates over the -40°C to +125°C temperature range and is available in a compact 8-pin (2mm x2mm) TDFN package. Simulation models are available.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 low-resistance on-chip MOSFETs ensure high efficiency at full load and simplify the PCB layout.To reduce input inrush current, the device offers an internal fixed soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at the desired input-voltage level. An open-drain RESET pin can be used for output-voltage monitoring.

Features

  • Eliminates External Components and Reduces Total Cost
  • No Schottky Synchronous Operation for High Efficiency and Reduced Cost
  • Internal Compensation and Feedback Divider
  • Internal Soft-Start
  • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
  • Wide 4.5V to 60V Input Voltage Range
  • Fixed 3.3V and 5V Output Voltages
  • Delivers Up to 300mA
  • Configurable Between PFM and Forced-PWM Modes
  • ● Reduces Power Dissipation
  • Peak Efficiency = 92%
  • PFM Feature for High Light-Load Efficiency
  • Shutdown Current = 2.2µA (typ)
  • Operates Reliably in Adverse Industrial Environments
  • Hiccup-Mode Current Limit and Autoretry Startup
  • 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 Automotive/Industrial Temperature Range

Typical applications

  • High-Voltage LDO Replacement
  • HVAC and BuildingControl
  • Battery-Powered Equipment
  • General-Purpose Point-of-Load
  • Industrial Sensors
  • 4–20mACurrent-LoopPoweredSensors

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(Ω)
RDC max.
(Ω)
fres
(MHz)
Version Samples
74408943101
STE ALT EAG CAD LTS PSP SPE IGS CADWE-SPC SMT Power Inductor 100 0.52 0.68 0.77 0.85 7.8 SMT
Order Code Data­sheet
74408943101
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(Ω)
RDC max.
(Ω)
fres
(MHz)
Version Samples