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4.5V to 60V, 1A High-Efficiency, Synchronous,
Inverting Output DC-DC Converters
MAX17577, MAX17578
General Description
Benefits and Features
The Himalaya series of voltage regulator ICs, power mod-
ules, and chargers enable cooler, smaller, and simpler
power-supply solutions. The MAX17577 and MAX17578
are high-efficiency, high-voltage, inverting, Himalaya syn-
chronous DC-DC converters with integrated MOSFETs
and internal compensation. The devices generate output
● Reduces External Components and Total Cost
• Synchronous Operation
• All-Ceramic Capacitors, Compact Layout
• Internal Loop Compensation
• System Ground Referenced I/O Pins (EN/UVLO,
RESET)
voltages (V
) from -0.9V to -36V and can deliver up to
OUT
● Flexibility to Support Multiple Rails in a System
• Adjustable Output Voltage Range from -0.9V to
-36V
1A of load current from a wide 4.5V to (60V - |V
put-voltage range.
|) in-
OUT
The devices feature peak current-mode control architec-
ture. The MAX17577 operates in continuous conduction
mode (CCM) at all loads; thus, providing a constant fre-
quency operation. The MAX17578 operates in discontinu-
ous conduction mode (DCM) for superior efficiency at light
loads. Low minimum on-time allows higher switching fre-
quencies and small solution sizes.
• Wide 4.5V to (60V - |V
• Up to 1A Output Current
• 400kHz to 2.2MHz Adjustable Frequency with
External Clock Synchronization
|) Input-Voltage Range
OUT
● Reduces Power Dissipation
• 90.6% Peak Efficiency
• DCM for Superior Light-Load Efficiency
• 6.2μA Shutdown Current
The devices allow the EN/UVLO, RESET, and RT/SYNC
pins to be driven by signals that are referenced to system
ground, eliminating the need for external-level shifter cir-
cuits. The feedback-voltage regulation accuracy is ±1.3%
over a wide -40°C to +125°C temperature range. The de-
vices are available in a compact 12-pin (3mm x 3mm)
TDFN-EP package. Simulation models are available.
● Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Overload Protection
• Adjustable Soft-Start
• Monotonic Startup with Prebiased Output Voltage
• Built-In Output-Voltage Monitoring with RESET
• Programmable EN/UVLO Threshold
• Complies with CISPR 32 (EN55032) Class B
Conducted and Radiated Emissions
Applications
● Industrial Control Power Supply
● General-Purpose Point-of-Load
● Gate-Drive Circuits
• Overtemperature Protection
• Wide -40°C to +125°C Ambient Operating
Temperature Range/ -40°C to +150°C Junction
Temperature Range
● Motion Control
● Wall-Transformer Regulation
● High-Voltage, Single-Board System
Simplified Application Circuit
IN
RESET
V
IN
EN/UVLO
BST
MAX17577/
MAX17578
RT/SYNC
LX
FB
V
CC
FB
SS
GND
FB
SOUT EP OUT
V
OUT
19-100840; Rev 1; 12/21
Ordering Information appears at end of data sheet.
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