LTC1516| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

LTC1516 Micropower, Regulated 5V Charge Pump DC/DC Converter
FEATURES
s s s s s s s

DESCRIPTION
The LTC 1516 is a micropower charge pump DC/DC converter that produces a regulated 5V output from a 2V to 5V supply. Extremely low supply current (12uA typical with no load, < 1uA in shutdown) and low external parts count (two 0.22uF flying capacitors and two 10uF capacitors at VIN and VOUT) make the LTC1516 ideally suited for small, light load battery-powered applications. Typical efficiency (VIN = 3V) exceeds 70% with load currents between 50uA and 50mA. Modulating the SHDN pin keeps the typical efficiency above 70% with load currents all the way down to 10uA. The LTC1516 operates as either a doubler or a tripler depending on VIN and output load conditions to improve overall efficiency. The part has thermal shutdown and can survive a continuous short from VOUT to GND. In shutdown the load is disconnected from VIN. The LTC1516 is available in an 8-pin SO package in both commercial and industrial temperature grades.
, LTC and LT are registered trademarks of Linear Technology Corporation.

s s s s

Ultralow Power: Typical Operating ICC = 12uA Short Circuit/Thermal Protection Regulated 5V 4% Output 2V to 5V Input Range No Inductors ICC in Shutdown: < 1uA Output Current: 20mA (VIN > 2V) 50mA (VIN > 3V) Shutdown Disconnects Load from VIN Internal Oscillator: 600kHz Compact Application Circuit (0.1 in2) 8-Pin SO Package

APPLICATIONS
s s s s s

2-Cell to 5V Conversion Li-Ion Battery Backup Supplies Local 3V to 5V Conversion 5V Flash Memory Programmer Smart Card Readers

TYPICAL APPLICATION
0.22uF

Efficiency vs Output Current
90 VIN = 3V

1 2

C1+ VIN VOUT C2+ 0.22uF

8 C1

80

+
10uF 3 10uF 4

EFFICIENCY (%)

VIN = 2V TO 5V

SHDN LTC1516 GND C2

7 6 5

ON/OFF

70

+

SHDN = 0V 60

VOUT = 5V 4% IOUT = 0mA TO 20mA, VIN 2V IOUT = 0mA TO 50mA, VIN 3V

50 0.01
1516 F01

Figure 1. Regulated 5V Output from a 2V to 5V Input

U

U

U

LOW IQ MODE (SEE FIGURE 3)

0.1 1 10 OUTPUT CURRENT (mA)

100
1516 TA01

1

LTC1516 Datasheet linear Download PDF

Add this permalink to your bookmarks for future download of LTC1516 datasheet

Permalink: http://datasheet.emcelettronica.com/linear/LTC1516

LTC1516 DATASHEET