19-0915; Rev 2; 9/08
CMOS Micropower Step-Up
Switching Regulator
General Description
Maxim’s MAX630 and MAX4193 CMOS DC-DC regula-
tors are designed for simple, efficient, minimum-size
DC-DC converter circuits in the 5mW to 5W range. The
MAX630 and MAX4193 provide all control and power
handling functions in a compact 8-pin package: a
1.31V bandgap reference, an oscillator, a voltage com-
parator, and a 375mA N-channel output MOSFET. A
comparator is also provided for low-battery detection.
Operating current is only 70µA and is nearly indepen-
dent of output switch current or duty cycle. A logic-level
input shuts down the regulator to less than 1µA quies-
cent current. Low-current operation ensures high effi-
ciency even in low-power battery-operated systems.
The MAX630 and MAX4193 are compatible with most
battery voltages, operating from 2.0V to 16.5V.
The devices are pin compatible with the Raytheon bipo-
lar circuits, RC4191/2/3, while providing significantly
improved efficiency and low-voltage operation. Maxim
also manufactures the MAX631, MAX632, and MAX633
DC-DC converters, which reduce the external compo-
nent count in fixed-output 5V, 12V, and 15V circuits.
See Table 2 at the end of this data sheet for a summary
of other Maxim DC-DC converters.
♦
♦
♦
♦
♦
♦
♦
♦
♦
Features
High Efficiency—85% (typ)
70µA Typical Operating Current
1µA Maximum Quiescent Current
2.0V to 16.5V Operation
525mA (Peak) Onboard Drive Capability
±1.5% Output Voltage Accuracy (MAX630)
Low-Battery Detector
Compact 8-Pin Mini-DIP and SO Packages
Pin Compatible with RC4191/2/3
MAX630/MAX4193
Ordering Information
PART
MAX630CPA
MAX630CSA
MAX630CJA
MAX630EPA
MAX630ESA
MAX630EJA
MAX630MJA
MAX630MSA/PR
MAX630MSA/PR-T
MAX4193C/D
MAX4193CPA
MAX4193CSA
MAX4193CJA
MAX4193EPA
MAX4193ESA
MAX4193EJA
MAX4193MJA
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-
PACKAGE
8 PDIP
8 SO
8 CERDIP
8 PDIP
8 SO
8 CERDIP
8 CERDIP**
8 SO†
8 SO†
Dice*
8 PDIP
8 SO
8 CERDIP
8 PDIP
8 SO
8 CERDIP
8 CERDIP**
Applications
+5V to +15V DC-DC Converters
High-Efficiency Battery-Powered DC-DC
Converters
+3V to +5V DC-DC Converters
9V Battery Life Extension
Uninterruptible 5V Power Supplies
5mW to 5W Switch-Mode Power Supplies
Typical Operating Circuit
+5V IN
470μH
6
I
C
8
LBD
5
+V
S
L
X
3
*Dice
are specified at T
A
= +25°C. Contact factory for dice
specifications.
**Contact
factory for availability and processing to MIL-STD-883.
†Contact
factory for availibility.
Pin Configuration
TOP VIEW
LBR 1
V
FB
7
+15V
OUT
MAX630
1
LBR
C
X
2
GND
4
8 LBD
7 V
FB
6
I
C
C
X
L
X
2
3
MAX630
MAX4193
47pF
GND 4
+5 TO +15V CONVERTER
5 +V
S
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
