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MAX15004 Datasheet(PDF) 9 Page - Maxim Integrated Products

Part No. MAX15004
Description  4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX15004 Datasheet(HTML) 9 Page - Maxim Integrated Products

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4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
_______________________________________________________________________________________
9
Pin Description
PIN
NAME
FUNCTION
1
IN
Input Power Supply. Bypass IN with a minimum 0.1μF ceramic capacitor to PGND.
2
ON/OFF
ON/OFF Input. Connect ON/OFF to IN for always-on operation. To externally program the UVLO threshold of the
IN supply, connect a resistive divider between IN, ON/OFF, and SGND. Pull ON/OFF to SGND to disable the
controller.
3
OVI
Overvoltage Comparator Input. Connect a resistive divider between the output of the power supply, OVI, and
SGND to set the output overvoltage threshold.
4
SLOPE
Programmable Slope Compensation Capacitor Input. Connect a capacitor (CSLOPE) to SGND to set the amount
of slope compensation.
Slope compensation = (2.5 x 10
-9) / CSLOPE mV/μs with CSLOPE in farads.
5
N.C.
No Connection. Not internally connected.
6
RTCT
Oscillator-Timing Network Input. Connect a resistor from RTCT to REG5 and a capacitor from RTCT to SGND to
set the oscillator frequency (see the Oscillator Frequency/External Synchronization section).
7
SGND
Signal Ground. Connect SGND to SGND plane.
8
SYNC
External-Clock Synchronization Input. Connect SYNC to SGND when not using an external clock.
9
SS
Soft-Start Capacitor Input. Connect a capacitor from SS to SGND to set the soft-start time interval.
10
FB
Internal Error-Amplifier Inverting Input. The noninverting input is internally connected to SS.
11
COMP
Error-Amplifier Output. Connect the frequency compensation network between FB and COMP.
12
CS
Current-Sense Input. The current-sense signal is compared to a signal proportional to the error-amplifier output
voltage.
13
REG5
5V Low-Dropout Regulator Output. Bypass REG5 with a 1μF ceramic capacitor to SGND.
14
PGND
Power Ground. Connect PGND to the power ground plane.
15
OUT
Gate Driver Output. Connect OUT to the gate of the external n-channel MOSFET.
16
VCC
7.4V Low-Dropout Regulator Output—Driver Power Source. Bypass VCC with 0.1μF and 1μF or higher ceramic
capacitors to PGND.
—EP
Exposed Pad (MAX15004A/MAX15005A only). Connect EP to the SGND plane to improve thermal performance.
Do not use the EP as an electrical connection.


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