MAX1833 Maxim, MAX1833 Datasheet - Page 6

• Manufacturer Part Number: MAX1833
• Description: High-Efficiency Step-Up Converters with Reverse Battery Protection
• Manufacturer: Maxim

High-Efficiency Step-Up Converters with
Reverse Battery Protection
Figure 1a. MAX1833/MAX1835 Typical Operating Circuit
6
BATTERY
+1.5V TO +3.3V
220kΩ
_______________________________________________________________________________________
1MΩ
MAX1832
MAX1834
10µF
R3
R4
—
1
2
3
4
5
6
10µH
PIN
C1
10nF
LX
SHDN
MAX1833
MAX1835
—
MAX1833
MAX1835
1
2
3
4
5
6
BATT
GND
OUT
RST
NAME
SHDN
BATT
GND
OUT
RST
LX
FB
100kΩ
10µF
POWER-ON
RESET
S hutd ow n. A hi g h l og i c l evel tur ns on the d evi ce. W hen SHD N i s l ow the p ar t i s off,
and the cur r ent i nto BATT i s typ i cal l y 0.1µA. For the M AX 1832/M AX 1833, the
b atter y i s connected to OU T thr oug h an i nter nal P FE T and the exter nal i nd uctor
w hen SHD N i s l ow . SHD N can b e used for l ow - b atter y cutoff ( 1.228V thr eshol d ) .
S ee Low - Batter y C utoff. SHD N has r ever se b atter y p r otecti on.
Battery Voltage Connection. BATT has reverse battery protection.
Ground
Inductor Connection. N-channel MOSFET switch drain and synchronous
rectifier P-channel switch drain. LX has reverse battery protection.
Output Voltage. Bootstrapped supply for the device. Output sense point for
MAX1833/MAX1835.
MAX1832/MAX1834 Feedback Input. Set the output voltage through a
resistor-divider network. See Setting the Output Voltage.
MAX1833/MAX1835 Power-On Reset Open-Drain Output. RST pulls low when
the output is 10% below the regulation point. If not used, connect to GND.
OUTPUT
+3.3V
Figure 1b. MAX1832/MAX1834 Typical Operating Circuit
+1.5V TO +5.0V
BATTERY
220kΩ
1MΩ
10µF
R3
R4
10µH
FUNCTION
10nF
C1
LX
SHDN
MAX1832
MAX1834
BATT
GND
Pin Description
OUT
FB
R2
309kΩ
R1
100kΩ
OUTPUT
+5.0V