LTC1263
12V, 60mA Flash Memory
Programming Supply
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DESCRIPTION
FEATURES
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The LTC ®1263 is a regulated 12V, 60mA output DC/DC
converter. It provides the 12V ±5% output necessary to
program double byte-wide flash memories. The output
provides 60mA from input voltages as low as 4.75V
without using any inductors. Only four external capacitors
are required to complete an extremely small, surface
mountable circuit. The output can be momentarily shorted
to ground without damaging the part.
Guaranteed 60mA Output
Regulated 12V ±5% Output Voltage
No Inductors
Supply Voltage Range: 4.75V to 5.5V
ICC 0.5µA Typ in Shutdown
Low Power: ICC = 300µA
8-Pin SO Package
Same Pinout as LTC1262 and MAX662
The active high TTL compatible Shutdown pin can be
directly connected to a microprocessor. In the shutdown
mode, the supply current typically drops to 0.5µA.
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APPLICATIONS
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12V Flash Memory Programming Supplies
Compact 12V Op Amp Supplies
Battery-Powered Systems
The LTC1263 is available in an 8-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATION
Flash Memory Programming Supply
Output Voltage vs Load
13.0
VCC
4.75V TO 5.5V
12.8
SHDN
–
C1
VCC
SHDN
µP
ON
0.47µF
C1+
12V
LTC1263
C2 –
0.47µF
C2+
5V
VOUT
FLASH
MEMORY
VPP
OUTPUT VOLTAGE (V)
12.6
10µF
12.4
12.2
12.0
11.8
11.6
11.4
11.2
GND
10µF
11.0
0
LTC1263 • TA01
20
40
60
80
LOAD CURRENT (mA)
100
LTC1263 • TA02
1
