MAX5008 データシートの表示（PDF） - Maxim Integrated
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MAX5008 Datasheet PDF : 7 Pages
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19-2426; Rev 1; 7/06
Regulated 5V USB Charge Pump with
Programmable Current Limit
General Description
The MAX5008 charge-pump regulator generates a reg-
ulated 5V output up to 125mA with a 2.95V to 5.5V input
voltage range. The device includes resistor-program-
mable overcurrent limit. The MAX5008 requires a mini-
mum number of external components for normal
operation. The high 1MHz switching frequency allows
the use of small surface-mount ceramic capacitors.
The fault-protection circuitry limits the output current
when it exceeds the limit set by an external resistor.
The output current can range from 1mA to 150mA to
accommodate circuit requirements. A FAULT output
indicates when the device is in current limit or the out-
put is out of regulation.
A low-power shutdown mode reduces supply current to
less than 1µA and places the output in a high-imped-
ance state. The MAX5008 is offered in a space-saving
10-pin µMAX® package that is only 1.1mm high.
Applications
Flash Memory Supplies
USB Host Devices
Battery-Powered Systems
3.3V to 5V Local Conversion
Features
♦ Regulated 5V Output Up to 125mA
♦ Indefinite Short-Circuit Protection
♦ Adjustable Output Current Limit
♦ No Inductors Required
♦ 0.1µA Shutdown Current
♦ Thermal Shutdown
♦ Fault Output Indicates Overcurrent or Output
Voltage Out of Regulation
♦ 2.95V to 5.5V Input Voltage Range
♦ 10-Pin µMAX Package
PART
MAX5008CUB
Ordering Information
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
10 µMAX
Pin Configuration appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
CX
0.68µF
VIN
2.95V TO 5.5V
4.7µF
100kΩ
7
9
CXN
CXP
8
IN
5
SHDN
2
OUT
200Ω*
MAX5008
3
FAULT
1
RCS
47nF*
200Ω*
CEXT 10
GND
PGND
IOUT
4
6
RCS
0.4Ω
VOUT
5V
COUT
4.7µF
CEXT
6.8µF
*USE IF PRECISION CURRENT LIMIT IS REQUIRED.
________________________________________________________________ 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.
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