EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX17670, MAX17671, Integrated 4V-60V, 150mA, High-Efficiency, MAX17672 Synchronous Step-Down DC-DC Converter with 50mA Linear Regulator General Description Benefits and Features The Himalaya series of voltage regulator ICs, power Reduces External Components and Total Cost modules, and chargers enable cooler, smaller, and sim- No SchottkySynchronous Operation pler power-supply solutions. MAX17670, MAX17671, and Internal Compensation MAX17672 are dual-output regulators integrating a 4V Built-In Soft-Start to 60V, 150mA high-voltage, high-efficiency, Himalaya All-Ceramic Capacitors, Compact Layout synchronous step-down converter with internal MOSFETs Protection against Inductive Short at Step-Down and a high-PSRR, low-noise, 2.35V to 5.5V, 50mA linear Converter Output regulator. The MAX17670 and MAX17671 provide fixed Reduces Number of DC-DC Regulators to Stock step-down converter output voltages of 3.3V and 5V, Wide 4V to 60V Input Range for the Step-Down respectively. The output voltage of the MAX17672 step- Converter Regulator down converter is adjustable (0.8V up to 90% of V ). IN Up to 98% Duty-Cycle Step-Down Operation 3.3V (MAX17671 and MAX17672 only), 3.0V, 2.5V, 1.8V, 200kHz to 2.2MHz Adjustable Switching Frequency 1.5V, and 1.2V linear regulator output voltage options are with External Synchronization for Step-down supported. See the Ordering Information for details. Converter The feedback-voltage regulation accuracy over -40C 2.35V to 5.5V, Input Range for the Linear Regulator to +125C temperature range for the linear regulator Linear Regulator with up to 50mA Load Current is 1.3% and for the step-down converter is 2%. The Capability devices are available in a compact 10-pin (3mm x 3mm) Reduces Power Dissipation TDFN package. Simulation models are available. 50A No-Load Supply Current Applications PFM Enables Enhanced Light-Load Efficiency Industrial Sensors and Process Control 2.5A Shutdown Current High-Voltage Linear Regulator Replacement Bootstrap Bias Input for Improved Efficiency Battery-Powered Equipment Reliable Operation in Adverse Environments HVAC and Building Control Peak Current-Limit Protection Built-In Output-Voltage Monitoring with RESET Ordering Information appears at end of data sheet. Resistor Programmable EN/UVLO Threshold Monotonic Startup into Prebiased Load Overtemperature Protection High Industrial -40C to +125C Ambient Operating Temperature Range / -40C to +150C Junction Temperature Range Simplified Application Circuit L1 VOUT VIN IN LX C1 C3 R1 GND EN/UVLO MAX17670/ R2 MAX17671 FBBUCK V OUTL OUTL C2 RESET MODE/SYNC RT INL EP 19-100364 Rev 2 4/20MAX17670, MAX17671, Integrated 4V-60V, 150mA, High-Efficiency, MAX17672 Synchronous Step-Down DC-DC Converter with 50mA Linear Regulator Absolute Maximum Ratings IN to GND ..............................................................-0.3V to +70V Linear Regulator and Step-Down Converter LX, EN/UVLO to GND ....................................-0.3V to IN + 0.3V Output Short-Circuit Duration ................................Continuous RT, OUTL, MODE/SYNC, RESET to GND .............-0.3V to +6V Continuous Power Dissipation INL to GND .......................-5.5V to lower of (V + 0.6V) or +6V (T = +70C, derate 24.4mW/C above +70C.) .......1952mW IN A FBBUCK to GND (MAX17670, MAX17671)............-5.5V to +6V Operating Temperature Range (Note 1) ........... -40C to +125C FBBUCK to GND (MAX17672) ...............................-0.3V to +6V Junction Temperature ....................................... -40C to +150C INL to FBBUCK ..........................................................-5V to +6V Storage Temperature Range ............................ -65C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 1: Junction temperature greater than +125C degrades operating lifetimes. Package Information PACKAGE TYPE: 10-PIN TDFN Package Code T1033+1C Outline Number 21-0137 Land Pattern Number 90-0003 THERMAL RESISTANCE, FOUR-LAYER BOARD: Junction to Ambient ( ) 41C/W JA Junction to Case ( ) 9C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Maxim Integrated 2 www.maximintegrated.com