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Analog Devices MAX15157B | Demoboard MAXREFDES1258
60V Current-Mode Buck Controller with Accurate Current Report
Overview
| Topology | Buck Converter |
| Switching frequency | 120-1000 kHz |
Description
The MAX15157B belongs to the family of MAX151574-switch, buck–boost controllers. MAX15157B drives two external MOSFETs in half-bridge buck configuration. The output voltage can be dynamically set through the 1V to 2.2V reference input (REFIN) for modular design support. The switching frequency is controlled either through an external resistor that sets the internal oscillator frequency, or by synchronizing the regulator to an external clock. The device is designed to support 120kHz to 1MHz switching frequencies. The controller has a dedicated undervoltage-lockout pin (UVLO) and an accurate enable input threshold for flexible power-sequence configuration. The controller also has multiple fault-protection circuits to protect against overcurrent (OCP), output overvoltage (OVP), input UVLO and thermal shutdown. The MAX15157B features an adjustable internal compensation ramp. The device incorporates an accurate current-sense amplifier that reports output current through an analog output (IMON). The device allows single-phase or multiphase (up to four-phase) operation. The device is footprint compatible with MAX15157 and is available in a 5mm x 5mm, 32-pin TQFN package and supports a -40°C to +125°C junction temperature range.
Features
- Wide Operating Range Reduces Development Time-8V to 60V Input-Voltage Range-3V to 56V Output-Voltage Range-120kHz to 1MHz Switching-Frequency Range--40°C to +125°C Temperature Range
- Integration Reduces Design Footprint-Internal LDO for Bias-Supply Generation-Synchronization Input-Current-Monitor Output
- Robust Fault Protection Improves Quality and Simplifies System Design-Adjustable Input Undervoltage Lockout-Average and Cycle-by-Cycle Overcurrent Protection-Input Undervoltage-Fault Protection-Multiple Levels of Overvoltage Protection-Thermal Shutdown
- Adjustable Slope Compensation
- Multiphase Support
- Small 5mm x 5mm, 32-pin TQFN, 0.5mm Pitch
Typical applications
- Communication
- Industrial, Automotive
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(mΩ) | Material | fres(MHz) | Version | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | Wire Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 4.7 µH, 35 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance4.7 µH | Rated Current35 A | Saturation Current78 A | DC Resistance2.64 mΩ | MaterialMnZn | Self Resonant Frequency20 MHz | VersionSMT | Performance Rated Current34.95 A | Saturation Current @ 10%70 A | Saturation Current @ 30%78 A | Wire TypeFlat | ||||
 | WE-SPC SMT Power Inductor, 100 µH, 0.52 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance100 µH | Rated Current0.52 A | Saturation Current0.68 A | DC Resistance850 mΩ | – | Self Resonant Frequency7.8 MHz | VersionSMT | – | – | – | – |