LTC1502CMS8-3.3#PBF Linear Technology, LTC1502CMS8-3.3#PBF Datasheet

LTC1502CMS8-3.3#PBF

Manufacturer Part Number

LTC1502CMS8-3.3#PBF

Description

IC DC/DC CONV 3.3V CHRGPMP 8MSOP

Manufacturer

Linear Technology

Type

Switched Capacitor (Charge Pump)r

Datasheet

1.LTC1502CS8-3.3PBF.pdf (8 pages)

Specifications of LTC1502CMS8-3.3#PBF

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

3.3V

Current - Output

10mA

Frequency - Switching

500kHz

Voltage - Input

0.9 ~ 1.8 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

8-MSOP, Micro8™, 8-uMAX, 8-uSOP,

Output Voltage

3.3V

Output Current

10mA

Operating Supply Voltage (min)

0.9V

Operating Supply Voltage (max)

1.8V

Operating Temp Range

0C to 70C

Operating Temperature Classification

Commercial

Package Type

MSOP

Pin Count

Mounting

Surface Mount

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Lead Free Status / Rohs Status

Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Part Number:

LTC1502CMS8-3.3#PBFLTC1502CMS8-3.3

Manufacturer:

Quantity:

10 000

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FEATURES

TYPICAL APPLICATIO

APPLICATIO S

Pagers

Battery Backup Supplies

Portable Electronic Equipment

Handheld Medical Instruments

Glucose Meters

Input Voltage Range: 0.9V to 1.8V

0.9V Guaranteed Start-Up Voltage

Regulated Output Voltage: 3.3V 4%

Output Current: 10mA (V

No Inductors

Shutdown Disconnects Load from V

Low Operating Current: 40 A

Low Shutdown Current: 5 A

Short-Circuit and Overtemperature Protected

Application Circuit Fits in < 0.125in

Available in 8-Pin MSOP and SO Packages

10 F

1 F

Single Cell to 3.3V DC/DC Converter

PCB LAYOUT FITS IN < 0.125IN

GND

LTC1502-3.3

–

/SHDN

OUT

–

1V)

1 F

10 F

PCB Area

SINGLE CELL

NiCd or

ALKALINE

10 F

OUT

1502-3.3 TA01

= 10mA

= 3.3V

DESCRIPTIO

The LTC

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 (40 A typical, 5 A 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

Forcing the C1

tive pull-down puts the part into shutdown mode. During

shutdown, the internal oscillator is stopped and the load is

disconnected from V

once the pull-down resistance is removed.

The LTC1502-3.3 is short-circuit protected and survives

an indefinite V

available in 8-pin MSOP and SO packages.

, LTC and LT are registered trademarks of Linear Technology Corporation.

–

/SHDN pin forces the part back into normal operation

Regulated Charge Pump

1502-3.3 is a quadrupler charge pump DC/DC

OUT

–

/SHDN pin low through an external resis-

3.5

3.4

3.2

3.1

3.0

3.3

short to ground. The LTC1502-3.3 is

0.8

DC/DC Converter

Single Cell to 3.3V

Output Voltage vs Input Voltage

. An internal pull-up current on the

= 25 C

1.0

INPUT VOLTAGE (V)

OUT

1.2

= 10mA

= 15mA

LTC1502-3.3

1.4

1.6

1502-3.3 TA02

1.8

Related parts for LTC1502CMS8-3.3#PBF

LTC1502CMS8-3.3#PBF Summary of contents

Page 1

... V – 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 available in 8-pin MSOP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation 3.3V OUT I = 10mA OUT 10 F ...

Page 2

... U RATINGS (Note 1) Operating Temperature Range Commercial ............................................ Extended Commercial (Note 4) .......... – Industrial ........................................... – Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER C2 1 LTC1502CMS8-3 – C1 /SHDN 3 GND 4 MS8 PART MARKING LTEC 8-LEAD PLASTIC SO T JMAX = 10 F unless otherwise specified. ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS No Load Input Current vs Input Voltage 0mA OUT – 40 ...

Page 4

LTC1502-3 PIN FUNCTIONS C2 (Pin 1): Charge Pump 1 (CP1) Output. This pin also serves as the input supply for charge pump 2 (CP2). To ensure proper start-up, the C2 pin must not be externally loaded. Bypass ...

Page 5

TEST CIRCUIT SWITCH CLOSED FOR SHUTDOWN U U APPLICATIONS INFORMATION Regulator Operation The LTC1502-3.3 uses a quadrupler charge pump DC/DC converter to produce a boosted output voltage. The quadrupler charge pump consists of two voltage doubler charge pumps (CP1 and ...

Page 6

LTC1502-3 APPLICATIONS INFORMATION LTC1502-3.3 3 – C1 /SHDN 4 GND 100 ON OFF V CTRL Figure 1. Pull-Down Circuitry for Shutdown – will force a logic high on the C1 /SHDN pin and ...

Page 7

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 8

... NiCd OR ALKALINE 1502-3.3 TA03 V = 3.3V OUT I = 300mA OUT (I = 10mA OUT IN BACKUP MODE 100 Q1 2N7002 LOGIC LOW = BACKUP MODE 1502-3.3 TA04 2.5V MSOP Package , 34V, SOT-23 Package OUT Noise 50mA, MSOP OUT 15023f LT/TP 0899 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 ...

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