MAX15004_11 Datasheet, PDF (9/27 Pages) Maxim Integrated Products – 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers

4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
Pin Description
PIN NAME
FUNCTION
1
IN
Input Power Supply. Bypass IN with a minimum 0.1μF ceramic capacitor to PGND.
ON/OFF Input. Connect ON/OFF to IN for always-on operation. To externally program the UVLO threshold of the
2 ON/OFF 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.
Programmable Slope Compensation Capacitor Input. Connect a capacitor (C_SLOPE) to SGND to set the amount
4
SLOPE of slope compensation.
Slope compensation = (2.5 x 10^-9) / C_SLOPE mV/μs with C_SLOPE 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
V_CC
7.4V Low-Dropout Regulator Output—Driver Power Source. Bypass V_CC 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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