Datasheet

MAX1722/MAX1723/
MAX1724
1.5μA I
Q
, Step-Up DC-DC
Converters in TSOT and µDFN
www.maximintegrated.com
Maxim Integrated │ 6
PIN
NAME FUNCTION
TSOT uDFN
MAX1722 MAX1723 MAX1724 MAX1722 MAX1723 MAX1724
1 — 1 2 — 2 BATT
Battery Input and Damping Switch
Connection
— 1 3 — 2 1 SHDN
Shutdown Input. Drive high for normal
operation. Drive low for shutdown.
2 2 2 3 3 3 GND Ground
3 3 — 1 1 — FB
Feedback Input to Set Output Voltage. Use a
resistor-divider network to adjust the output
voltage. See Setting the Output Voltage
section.
4 4 4 6 6 6 OUT
Power Output. OUT also provides bootstrap
power to the IC.
5 5 5 4 4 4 LX
Internal N-channel MOSFET Switch Drain
and P-Channel Synchronous Rectier Drain
— — — 5 5 5 N.C. No connect.
Pin Description
Pin Congurations
TOP VIEW
GND
OUT
1 5 LXBATT
MAX1724
TSOT
2
3 4
SHDN
GND
OUTFB
1 5 LXSHDN
TSOT
2
3 4
MAX1723
GND
OUTFB
1
+
5 LXBATT
MAX1722
TSOT
2
3 4
4
5
6
3
1
2
FB
BATT
GND
OUT
N.C.
LX
MAX1722
µDFN
4
5
6
3
1
2
SHDN
BATT
GND
OUT
N.C.
LX
MAX1724
µDFN
4
5
6
3
1
2
FB
SHDN
GND
OUT
N.C.
LX
MAX1723
µDFN