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MAX17670, MAX17671,
MAX17672
Integrated 4V-60V, 150mA, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with 50mA Linear Regulator
General Description
Benefits and Features
The Himalaya series of voltage regulator ICs, power
modules, and chargers enable cooler, smaller, and sim-
pler power-supply solutions. MAX17670, MAX17671, and
MAX17672 are dual-output regulators integrating a 4V
to 60V, 150mA high-voltage, high-efficiency, Himalaya
synchronous step-down converter with internal MOSFETs
and a high-PSRR, low-noise, 2.35V to 5.5V, 50mA linear
regulator. The MAX17670 and MAX17671 provide fixed
step-down converter output voltages of 3.3V and 5V,
respectively. The output voltage of the MAX17672 step-
● Reduces External Components and Total Cost
• No Schottky–Synchronous Operation
• Internal Compensation
• Built-In Soft-Start
• All-Ceramic Capacitors, Compact Layout
•
Protection against Inductive Short at Step-Down
Converter Output
● Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 60V Input Range for the Step-Down
Converter Regulator
• Up to 98% Duty-Cycle Step-Down Operation
• 200kHz to 2.2MHz Adjustable Switching Frequency
with External Synchronization for Step-down
Converter
• 2.35V to 5.5V, Input Range for the Linear Regulator
• Linear Regulator with up to 50mA Load Current
Capability
down converter is adjustable (0.8V up to 90% of V ).
IN
3.3V (MAX17671 and MAX17672 only), 3.0V, 2.5V, 1.8V,
1.5V, and 1.2V linear regulator output voltage options are
supported. See the Ordering Information for details.
The feedback-voltage regulation accuracy over -40°C
to +125°C temperature range for the linear regulator
is ±1.3% and for the step-down converter is ±2%. The
devices are available in a compact 10-pin (3mm x 3mm)
TDFN package. Simulation models are available.
●
Reduces Power Dissipation
• 50μA No-Load Supply Current
Applications
● Industrial Sensors and Process Control
● High-Voltage Linear Regulator Replacement
● Battery-Powered Equipment
• PFM Enables Enhanced Light-Load Efficiency
• 2.5μA Shutdown Current
• Bootstrap Bias Input for Improved Efficiency
● Reliable Operation in Adverse Environments
● HVAC and Building Control
• Peak Current-Limit Protection
• Built-In Output-Voltage Monitoring with RESET
• Resistor Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Load
• Overtemperature Protection
Ordering Information appears at end of data sheet.
• High Industrial -40°C to +125°C Ambient Operating
Temperature Range / -40°C to +150°C Junction
Temperature Range
Simplified Application Circuit
L1
V
OUT
V
IN
IN
LX
C1
C3
R1
R2
GND
EN/UVLO
MAX17670/
MAX17671
FBBUCK
RESET
INL
OUTL
V
OUTL
C2
MODE/SYNC
RT
EP
19-100364; Rev 2; 4/20