MAX17112 Maxim Integrated Products, MAX17112 Datasheet - Page 6

• Manufacturer Part Number: MAX17112
• Description: DC-DC Converter
• Manufacturer: Maxim Integrated Products

www.DataSheet4U.com
High-Performance, Step-Up, DC-DC Converter
Figure 1. Typical Operating Circuit
6
_______________________________________________________________________________________
PIN
4, 5
6, 7
10
—
1
2
3
8
9
4.7μF
NAME
COMP
GND
10V
4.5V TO 5.5V
FB
LX
SS
EP
V
C1
IN
L
V
IN
4.7μF
10V
C2
Compensation Pin for Error Amplifier. Connect a series RC from COMP to ground. Typical values
are 47k
Feedback. The FB regulation voltage is 1.24V nominal. Connect an external resistor-divider center
tap here and minimize the trace area. Set V
IC Supply. There is an internal switch between IN and V
overvoltage condition on IN is detected. Bypass V
Ground
Switch. LX is the drain of the internal MOSFET.
Supply Voltage Input. Bypass IN with a minimum 1μF ceramic capacitor directly to GND.
Shutdown Control Input. Drive
capacitor to the
microfarads.
in series with
Soft-Start Control. Connect a soft-start capacitor (C
capacitor is charged at a rate of 4μA/C
Exposed Pad. Connect to GND.
C10
1μF
1μF
and 580pF.
C9
3.3nF
1μF
C4
C3
can be driven from a logic signal directly, in which case a resistor is required
.
10
8
9
3
pin to create a delayed turn-on. The time delay is 0.25 x C (typ), C in
IN
SHDN
V
SS
L
2.7μH
560pF
47kΩ
L1
MAX17112
C5
R2
COMP
1
U1
high to turn on the MAX17112 for normal operation. Connect a
SS
C6
OPEN
.
GND
GND
GND
LX
LX
FB
OUT
FUNCTION
6
7
5
4
2
EP
according to the Output Voltage Selection section.
SS
L
to GND with a 1μF capacitor.
). Leave open for no soft-start. The soft-start
D1
L
and the switch disconnects when an
R4
221kΩ
R3
20kΩ
C7
10μF
25V
+15V/600mA
Pin Description
C8
10μF
25V
V
OUT