19-6178; Rev 0; 1/12
E V A L U A T I O N K I T A V A I L A B L E
MAX17595/MAX17596/MAX17597
Peak-Current-Mode Controllers for
Flyback and Boost Regulators
General Description
Benefits and Features
The MAX17595/MAX17596/MAX17597 is a family of peak-
current-mode controllers which contain all the circuitry
required for the design of wide input-voltage flyback
and boost regulators. The MAX17595 offers optimized
input rising and falling thresholds for universal input
AC-DC converters and telecom DC-DC (36V–72V input
range) power supplies. The MAX17596 offers input rising
and falling thresholds suitable for low-voltage DC-DC
applications (4.5V–36V input range). The MAX17597
offers all circuitry needed to implement a boost converter
controller. All three controllers contain a built-in gate
driver for external n-channel MOSFETs.
S Peak Current Mode Offline (Universal Input AC)
and Telecom (36V–72V) Flyback Controller
(MAX17595)
S Peak-Current-Mode DC-DC Flyback Controller
(4.5V–36V Input Range) (MAX17596)
S Peak-Current-Mode Nonsynchronous Boost PWM
Controller (4.5V–36V Input Range) (MAX17597)
S Current Mode Control Provides Excellent
Transient Response
S Low 20µA Startup Supply Current
S 100kHz to 1MHz Programmable Switching
The MAX17595/MAX17596/MAX17597 house an inter-
nal error amplifier with 1% accurate reference, useful
in implementations without the need for an external
reference. The switching frequency is programmable
from 100kHz to 1MHz with an accuracy of 8% using an
external resistor, allowing optimization of magnetic and
filter components, resulting in compact and cost-effective
power conversion solutions. For EMI sensitive applica-
tions, the MAX17595/MAX17596/MAX17597 family incor-
porates a programmable-frequency dithering scheme,
enabling low-EMI spread-spectrum operation.
Frequency
S Programmable Frequency Dithering for Low-EMI
Spread-Spectrum Operation
S Switching Frequency Synchronization
S Adjustable Current Limit with External Current-
Sense Resistor
S Fast Cycle-By-Cycle Peak Current Limiting
S Hiccup-Mode Short-Circuit Protection
S Overtemperature Protection
An EN/UVLO input allows the user to start the
power supply precisely at the desired input voltage,
while also functioning as an on/off pin. The OVI pin
enables implementation of an input overvoltage protection
scheme, ensuring that the converter shuts down when
the DC input voltage exceeds a set maximum value. The
SS pin allows programmable soft-start time for the power
converter, and helps limit inrush current during startup.
The MAX17595/MAX17596/MAX17597 family also allows
the designer to choose between voltage soft-start and
current soft-start modes, useful in optoisolated designs.
A programmable slope compensation scheme is pro-
vided to enhance the stability of the peak-current-mode
control scheme.
S Programmable Soft-Start and Slope Compensation
S Programmable Voltage or Current Soft-Start
Schemes
S Input Overvoltage Protection
S Space-Saving, 3mm x 3mm TQFN Package
Applications
Universal Input Offline AC-DC Power Supplies
Wide-Range DC-Input Flyback/Boost Battery
Chargers
Battery-Powered Applications
Industrial, Telecom, and Automotive Applications
Hiccup-mode overcurrent protection and thermal
shutdown are provided to minimize dissipation in
overcurrent and overtemperature fault conditions. The IC
is available in a space-saving 16-pin, 3mm x 3mm TQFN
package with 0.5mm lead spacing.
Ordering Information/Selector Guide appears at end of
data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX17595.related.
����������������������������������������������������������������� Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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