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MAX15004A/B/C/D-
MAX15005A/B/C/D
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC
Power-Supply Controllers
General Description
Benefits and Features
● Wide Supply Voltage Range Meets Automotive
Power-Supply Operating Requirement Including
“Cold Crank” Conditions
The MAX15004/MAX15005 high-performance, current-
mode PWM controllers operate at an automotive input
voltage range from 4.5V to 40V (load dump). The input
voltage can go lower than 4.5V after startup if IN is boot-
strapped to a boosted output voltage. The controllers
integrate all the building blocks necessary for implement-
ing fixed-frequency isolated/nonisolated power supplies.
The general-purpose boost, flyback, forward, and SEPIC
converters can be designed with ease around the
MAX15004/MAX15005.
• 4.5V to 40V Operating Input Voltage Range
(Can Operate at Lower Voltage After Startup if
Input is Bootstrapped to a Boosted Output)
● Control Architecture Offers Excellent Performance
While Simplifying the Design
• Current-Mode Control
• 300mV, 5% Accurate Current-Limit Threshold
Voltage
• Programmable Slope Compensation
• 50% (MAX15004) or Adjustable (MAX15005)
Maximum Duty Cycle
The current-mode control architecture offers excellent line-
transient response and cycle-by-cycle current limit while
simplifying the frequency compensation. Programmable
slope compensation simplifies the design further. A fast
60ns current-limit response time, low 300mV current-limit
threshold makes the controllers suitable for high-efficiency,
high-frequency DC-DC converters. The devices include
an internal error amplifier and 1% accurate reference to
facilitate the primary-side regulated, single-ended flyback
converter or nonisolated converters.
● Accurate, Adjustable Switching Frequency and
Synchronization Avoids Interference with Sensitive
Radio Bands
• Switching Frequency Adjustable from 15kHz to
500kHz (1MHz for the MAX15005A/B/C/D)
• RC Programmable 4% Accurate Switching
Frequency
An external resistor and capacitor network programs the
switching frequency from 15kHz to 500kHz (1MHz for
the MAX15005). The MAX15004A/MAX15005 provide a
SYNC input for synchronization to an external clock. The
maximum FET-driver duty cycle for the MAX15004A/B/C/D
is 50%. The maximum duty cycle can be set on the
MAX15005A/B/C/D by selecting the right combination of
RT and CT.
• External Frequency Synchronization
● Built-In Protection Capability for Improved System
Reliability
• Cycle-by-Cycle and Hiccup Current-Limit
Protection
• Overvoltage and Thermal-Shutdown Protection
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
The input undervoltage lockout (ON/OFF) programs the
input-supply startup voltage and can be used to shutdown
the converter to reduce the total shutdown current down
to 10µA. Protection features include cycle-by-cycle and
hiccup current limit, output overvoltage protection, and
thermal shutdown.
Ordering Information
PART
PIN-PACKAGE MAX DUTY CYCLE
MAX15004AAUE+
MAX15004AAUE/V+
MAX15004BAUE+
MAX15004BAUE/V+
16 TSSOP-EP*
16 TSSOP-EP*
16 TSSOP
50%
50%
50%
The MAX15004/MAX15005 are available in space-saving
16-pin TSSOP and thermally enhanced 16-pin TSSOP-EP
packages. All devices operate over the -40°C to +125°C
automotive temperature range.
16 TSSOP
50%
MAX15004CAUE/V+** 16 TSSOP-EP*
MAX15004DAUE/V+** 16 TSSOP
50%
50%
MAX15005AAUE+
MAX15005AAUE/V+
MAX15005BAUE+
MAX15005BAUE/V+
16 TSSOP-EP*
16 TSSOP-EP*
16 TSSOP
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Applications
● Automotive
● Vacuum Fluorescent Display (VFD) Power Supply
● Isolated Flyback, Forward, Nonisolated SEPIC,
Boost Converters
16 TSSOP
MAX15005CAUE/V+** 16TSSOP-EP*
MAX15005DAUE/V+ 16 TSSOP
Note: All devices are specified over the -40°C to +125°C
temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
** Future product—contact
factory for availability
19-0723; Rev 9; 2/20
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