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LTC1502CMS8-3.3

Description
Single Cell to 3.3V Regulated Charge Pump DC/DC Converter
CategoryPower/power management    The power supply circuit   
File Size165KB,8 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1502CMS8-3.3 Overview

Single Cell to 3.3V Regulated Charge Pump DC/DC Converter

LTC1502CMS8-3.3 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeMSOP
package instructionPLASTIC, MSOP-8
Contacts8
Manufacturer packaging codeMS8
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHED CAPACITOR REGULATOR
Maximum input voltage1.8 V
Minimum input voltage0.9 V
JESD-30 codeS-PDSO-G8
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current0.01 A
Nominal output voltage3.3 V
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.19
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationDOUBLER INVERTER
Maximum switching frequency500 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3 mm
LTC1502-3.3
Single Cell to 3.3V
Regulated Charge Pump
DC/DC Converter
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Input Voltage Range: 0.9V to 1.8V
0.9V Guaranteed Start-Up Voltage
Regulated Output Voltage: 3.3V
±4%
Output Current: 10mA (V
IN
1V)
No Inductors
Shutdown Disconnects Load from V
IN
Low Operating Current: 40µA
Low Shutdown Current: 5µA
Short-Circuit and Overtemperature Protected
Application Circuit Fits in < 0.125in
2
PCB Area
Available in 8-Pin MSOP and SO Packages
The LTC
®
1502-3.3 is a quadrupler charge pump DC/DC
converter that produces a regulated 3.3V output from a
single alkaline cell input. It requires only five small external
capacitors—no inductors are required. Low supply cur-
rent (40µA typical, 5µA in shutdown) and minimal external
components make the LTC1502-3.3 ideal for space and
power conscious single-cell applications. The total printed
circuit board area of the circuit shown below is less than
0.125in
2
.
Forcing the C1
/SHDN pin low through an external resis-
tive pull-down puts the part into shutdown mode. During
shutdown, the internal oscillator is stopped and the load is
disconnected from V
IN
. An internal pull-up current on the
C1
/SHDN pin forces the part back into normal operation
once the pull-down resistance is removed.
The LTC1502-3.3 is short-circuit protected and survives
an indefinite V
OUT
short to ground. The LTC1502-3.3 is
available in 8-pin MSOP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Pagers
Battery Backup Supplies
Portable Electronic Equipment
Handheld Medical Instruments
Glucose Meters
TYPICAL APPLICATIO
1
10µF
2
8
Single Cell to 3.3V DC/DC Converter
3.5
C2
V
OUT
7
C1
+
C3
+
1µF
LTC1502-3.3
6
3
C1
/SHDN C3
4
5
GND
V
IN
10µF
1µF
V
IN
SINGLE CELL
NiCd or
ALKALINE
1502-3.3 TA01
V
OUT
= 3.3V
I
OUT
= 10mA
3.4
OUTPUT VOLTAGE (V)
3.3
I
OUT
= 10mA
I
OUT
= 15mA
10µF
3.2
3.1
PCB LAYOUT FITS IN < 0.125IN
2
3.0
0.8
U
Output Voltage vs Input Voltage
T
A
= 25°C
1.0
1.4
1.6
1.2
INPUT VOLTAGE (V)
1.8
1502-3.3 TA02
U
U
1

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