19-0915; Rev 2; 9/08
CMOS Micropower Step-Up
Switching Regulator
Maxim’s MAX630 and MAX4193 CMOS DC-DC regulators 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 comparator, and a 375mA N-channel output MOSFET. A
comparator is also provided for low-battery detection.
Operating current is only 70µA and is nearly independent of output switch current or duty cycle. A logic-level
input shuts down the regulator to less than 1µA quiescent current. Low-current operation ensures high efficiency even in low-power battery-operated systems.
The MAX630 and MAX4193 are compatible with most
battery voltages, operating from 2.0V to 16.5V.
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
Ordering Information
PART
PINPACKAGE
TEMP RANGE
8 PDIP
0°C to +70°C
8 SO
MAX630CJA
0°C to +70°C
8 CERDIP
MAX630EPA
-40°C to +85°C
8 PDIP
MAX630ESA
-40°C to +85°C
8 SO
MAX630EJA
-40°C to +85°C
8 CERDIP
MAX630MJA
-55°C to +125°C
8 CERDIP**
MAX630MSA/PR
-55°C to +125°C
8 SO†
MAX630MSA/PR-T
-55°C to +125°C
8 SO†
0°C to +70°C
Dice*
0°C to +70°C
8 PDIP
MAX4193CSA
+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
0°C to +70°C
MAX630CSA
MAX4193CPA
Applications
MAX630CPA
MAX4193C/D
The devices are pin compatible with the Raytheon bipolar 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 component 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.
0°C to +70°C
8 SO
MAX4193CJA
470μH
5
+VS
LBD
-40°C to +85°C
8 CERDIP
MAX4193MJA
-55°C to +125°C
8 CERDIP**
TOP VIEW
LBR 1
VFB
LBR
47pF
8 SO
Pin Configuration
LX
CX
2
-40°C to +85°C
3
MAX630
1
GND
4
8 CERDIP
*Dice are specified at TA = +25°C. Contact factory for dice
specifications.
**Contact factory for availability and processing to MIL-STD-883.
†Contact factory for availibility.
+5V IN
8
8 PDIP
MAX4193EJA
6
IC
-40°C to +85°C
MAX4193ESA
Typical Operating Circuit
0°C to +70°C
MAX4193EPA
7
+15V
OUT
CX
2
LX
3
8 LBD
GND 4
MAX630
MAX4193
7 VFB
6
IC
5 +VS
+5 TO +15V CONVERTER
________________________________________________________________ Maxim Integrated Products
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.
1
MAX630/MAX4193
General Description
