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MAX17760

INTERACTIVE Data Sheet Buy Now Download

4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

76V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise

INTERACTIVE Data Sheet

Product Details

General Description

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17760 is a high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operating over an input-voltage range of 4.5V to 76V. The device can deliver up to 300mA current. Output voltage is programmable from 0.8V up to 88% of input voltage (V_IN). Built-in control loop compensation eliminates the need for external components.

The MAX17760 features a peak-current-mode control architecture. The device can be operated in either the forced pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. Forced PWM mode provides constant frequency operation at all loads for frequency sensitive applications, while PFM mode provides superior light-load efficiency by skipping pulses. The device integrates an open drain RESET output voltage monitor, adjustable input undervoltage lockout (EN/UVLO) and programmable soft-start.

The feedback voltage regulation accuracy over -40°C to +125°C is +1.6% to -1.7%. The MAX17760 is available in a compact 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

Simplified Application Circuit

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Benefits and Features

Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- Internal Compensation Components
- All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 76V Input
- Adjustable Output Range from 0.8V up to 88% of V_IN
- Up to 300mA Output Current
- 200kHz, 300kHz, 400kHz, and 600kHz Programmable Switching Frequency with External Clock Synchronization.
Reduces Power Dissipation
- 93% Peak Efficiency
- PFM Mode Enables Enhanced Light-Load Efficiency
- EXTVCC Bootstrap Input for Improved Efficiency
- 5μA Shutdown Current

Operates Reliably in Adverse Industrial Environments
- Built-in Hiccup Mode Overload Protection
- Programmable Soft-Start and Prebiased Power-up
- Built-in Output-Voltage Monitoring with RESET
- Programmable EN/UVLO Threshold
- Overtemperature Protection
- CISPR 22 Class B Compliant
- Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Applications

Industrial Control Power Supplies
General Purpose Point-of-Load
Distributed Supply Regulation
Base Station Power Supplies
Wall Transformer Regulation
High Voltage Single-Board Systems

19-100795; Rev 0; 4/20

See parametric specs for Step-Down Switching Regulators

Key Features

Applications/Uses

See parametric specs for Step-Down Switching Regulators

Parametric specs for Step-Down Switching Regulators

V_IN (V) (min)	4.5
V_IN (V) (max)	76
V_OUT1 (V) (min)	0.9
V_OUT1 (V) (max)	67
I_OUT1 (A) (max)	0.3
Switch Type	Internal
Output Adjust. Method	Resistor
Synchronous Switching?	Yes
Power Good Signal	Yes
I_CC (mA) (typ)	0.075
# DC-DC Outputs	1
Switching Frequency (kHz)	400
Design Tools	EE-Sim
Package/Pins	TDFN-CU/12
Budgetary Price (See Notes)	1.37

See parametric specs for Step-Down Switching Regulators

Simplified Block Diagram

Technical Docs

Data Sheet

4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

Jun 17, 2020

Design & Development

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Evaluation Board

MAX17760AEVKIT

Data Sheet

$31.51

Description

The MAX17760AEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the MAX17760 high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 5V at load currents up to 300mA from a 7V to 76V input supply. The EV kit features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, adjustable switching frequency, open-drain active-low RESET signal, and external clock synchronization. The EV kit also provides a good layout example, which is optimized for conducted, radiated EMI, and thermal performance. For more details about the IC benefits and features, refer to the MAX17760 IC data sheet.

View Details

Features

Operates from a 7V to 76V Input Supply
5V Output Voltage
Up to 300mA Output Current
400kHz Switching Frequency
Enable/UVLO Input, Resistor-Programmable UVLO Threshold
Adjustable Soft-Start Time
MODE Pin to Select between PWM or PFM Modes
Bootstrap Bias Input for Improved Efficiency
Open-Drain Active-Low RESET Output
External Clock Synchronization
Overcurrent and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested
Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions

Tools & Models

EE-Sim: Design & Simulate MAX17760

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Support & Training

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General Description

The feedback voltage regulation accuracy over -40°C to +125°C is +1.6% to -1.7%. The MAX17760 is available in a compact 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

Simplified Application Circuit

Enlarge+ Enlarge+

Benefits and Features

Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- Internal Compensation Components
- All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 76V Input
- Adjustable Output Range from 0.8V up to 88% of V_IN
- Up to 300mA Output Current
- 200kHz, 300kHz, 400kHz, and 600kHz Programmable Switching Frequency with External Clock Synchronization.
Reduces Power Dissipation
- 93% Peak Efficiency
- PFM Mode Enables Enhanced Light-Load Efficiency
- EXTVCC Bootstrap Input for Improved Efficiency
- 5μA Shutdown Current

Operates Reliably in Adverse Industrial Environments
- Built-in Hiccup Mode Overload Protection
- Programmable Soft-Start and Prebiased Power-up
- Built-in Output-Voltage Monitoring with RESET
- Programmable EN/UVLO Threshold
- Overtemperature Protection
- CISPR 22 Class B Compliant
- Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Applications

Industrial Control Power Supplies
General Purpose Point-of-Load
Distributed Supply Regulation
Base Station Power Supplies
Wall Transformer Regulation
High Voltage Single-Board Systems

19-100795; Rev 0; 4/20

Parameters

Parametric specs for Step-Down Switching Regulators

V_IN (V) (min)	4.5
V_IN (V) (max)	76
V_OUT1 (V) (min)	0.9
V_OUT1 (V) (max)	67
I_OUT1 (A) (max)	0.3
Switch Type	Internal
Output Adjust. Method	Resistor
Synchronous Switching?	Yes
Power Good Signal	Yes
I_CC (mA) (typ)	0.075
# DC-DC Outputs	1
Switching Frequency (kHz)	400
Design Tools	generateDesignEESIMUrl('https://maxim.transim.com/pwm2/designreq/Index?partId=24063', '')
Package/Pins	TDFN-CU/12
Budgetary Price (See Notes)	1.37

See parametric specs for Step-Down Switching Regulators