LTC1517-5 LINER [Linear Technology], LTC1517-5 Datasheet

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LTC1517-5

Manufacturer Part Number
LTC1517-5
Description
Micropower, Regulated 5V Charge Pump in a 5-Pin SOT-23 Package
Manufacturer
LINER [Linear Technology]
Datasheet
APPLICATIONS
TYPICAL
FEATURES
Cellular Telephones
Battery-Operated Equipment
Local Power Supplies
Handheld Instruments
PCMCIA Supplies
Ultralow Power: I
Short-Circuit/Thermal Protected
5V 4% Regulated Output
V
Output Current: 10mA (V
No Inductors
Ultrasmall Application Circuit (0.045in
800kHz Switching Frequency
Available in 5-Pin SOT-23
IN
Range: 2.7V to 5V
2.7V TO 5V
APPLICATION
V
IN
3.3 F
U
20mA (V
CC
C1
V
IN
= 6 A Typ
5
1
LTC1517-5
0.1 F
IN
GND
IN
2
2.7V)
3V)
V
C1
U
OUT
4
+
3
6.8 F
V
I
I
OUT
OUT
2
OUT
)
= 10mA (V
= 20mA (V
= 5V 4%
IN
IN
1517 TA01
2.7V)
3V)
DESCRIPTION
The LTC
converter that produces a regulated 5V output. The input
voltage range is 2.7V to 5V. Extremely low operating current
(typically 6 A with no load) and low external parts count (one
0.1 F flying capacitor and two small bypass capacitors at V
and V
battery-powered applications. The total printed circuit board
area of the application circuit shown below is only 0.045in
The part operates as a Burst Mode
voltage doubler to produce a regulated output. The part has
thermal shutdown capability and can survive a continuous
short circuit from V
5-pin SOT-23 package.
Burst Mode is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
OUT
Micropower, Regulated
®
) make the part ideally suited for small, light load
5-Pin SOT-23 Package
1517-5 is a micropower charge pump DC/DC
5V Charge Pump in a
Typical Output Voltage vs Output Current
5.2
5.1
5.0
4.9
4.8
0
T
C1 = 0.1 F
C
A
OUT
OUT
U
= 25 C
= 6.8 F
to GND. The device is available in a
20
OUTPUT CURRENT (mA)
V
IN
= 2.7V
40
V
IN
= 3V
TM
60
LTC1517-5
switched-capacitor
V
IN
= 3.3V
1517 TA02
80
1
IN
2
.

Related parts for LTC1517-5

LTC1517-5 Summary of contents

Page 1

... OUT I = 10mA (V 2.7V) OUT 20mA (V 3V) OUT IN 6.8 F 1517 TA01 LTC1517-5 5V Charge Pump in a 5-Pin SOT-23 Package U 1517 micropower charge pump DC/DC TM switched-capacitor to GND. The device is available in a OUT Typical Output Voltage vs Output Current 5 0 6.8 F OUT 5 ...

Page 2

... LTC1517 ABSOLUTE MAXIMUM (Note GND ...................................................– 0. GND ................................................– 0. OUT V Short-Circuit Duration ............................. Indefinite OUT Operating Temperature Range: Commercial (Note 2) .............................. Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS V = 2. ...

Page 3

... INPUT VOLTAGE (V) 1517-5 G02 Efficiency vs Output Current SHDN = 0.01 0 100 OUTPUT CURRENT (mA) 1517-5 G05 LTC1517-5 Output Ripple vs Input Voltage 250 I = 10mA OUT 200 C = 3.3 F OUT 150 C = 6.8 F OUT 100 OUT ...

Page 4

... C1 (Pin 4): Charge Pump Flying Capacitor Positive Terminal. – C1 (Pin 5): Charge Pump Flying Capacitor Negative Terminal 0.1 F – CHARGE PUMP + 800kHz – OSC THERMAL 1.25V SHDN REF LTC1517-5 should be OUT V OUT 3.75M C OUT 1.25M 1517 BD ...

Page 5

... C. The charge pump is OUT reenabled once the junction temperature drops to approxi- mately 145 C. The LTC1517-5 will cycle in and out of thermal shutdown indefinitely without latchup or damage until the V may not be needed. applications. ...

Page 6

... OUT 10mA (V 3.6V OUT IN V < 2mV RIPPLE P-P 1517 TA04a Generating 5V and a Negative Supply 0 – LTC1517-5 V GND V IN OUT 3.3 F 470 CENTRAL SEMICONDUCTOR CMPSH-35 DUAL SCHOTTKY ** OPTIONAL CIRCUITRY FOR MAINTAINING – V WITH LOW OUT ...

Page 7

... REF 1.50 – 1.75 0.00 – 0.15 (0.059 – 0.069) (0.00 – 0.006) 0.35 – 0.50 0.09 – 0.20 (0.014 – 0.020) (0.004 – 0.008) FIVE PLACES (NOTE 2) (NOTE 2) LTC1517-5 0.95 (0.037) REF 0.90 – 1.45 (0.035 – 0.057) 0.90 – 1.30 (0.035 – 0.051) S5 SOT-23 0797 7 ...

Page 8

... 10K 1% + C15 10 F 10V 1517 TA03 COMMENTS 3. Output Up to 50mA Fixed or Adjustable Output Up to 50mA 20mA for V 2V, 50mA for Same as LTC1517-5 with Shutdown, Available in MSOP 15175f LT/TP 0298 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1997 ...

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