LTC1263 Linear Technology, LTC1263 Datasheet

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LTC1263

Manufacturer Part Number
LTC1263
Description
12V/ 60mA Flash Memory Programming Supply
Manufacturer
Linear Technology
Datasheet

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APPLICATIONS
FEATURES
TYPICAL
12V Flash Memory Programming Supplies
Compact 12V Op Amp Supplies
Battery-Powered Systems
Guaranteed 60mA Output
Regulated 12V 5% Output Voltage
No Inductors
Supply Voltage Range: 4.75V to 5.5V
I
Low Power: I
8-Pin SO Package
Same Pinout as LTC1262 and MAX662
CC
0.47 F
0.47 F
0.5 A Typ in Shutdown
Flash Memory Programming Supply
10 F
APPLICATION
CC
C1
C1
C2
C2
+
+
4.75V TO 5.5V
= 300 A
U
LTC1263
GND
V
V
CC
CC
SHDN
V
OUT
12V
ON
U
10 F
SHDN
5V
LTC1263 • TA01
VPP
MEMORY
FLASH
P
The LTC
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.
The active high TTL compatible Shutdown pin can be
directly connected to a microprocessor. In the shutdown
mode, the supply current typically drops to 0.5 A.
The LTC1263 is available in an 8-pin SO package.
DESCRIPTION
, LTC and LT are registered trademarks of Linear Technology Corporation.
12V, 60mA Flash Memory
®
1263 is a regulated 12V, 60mA output DC/DC
Programming Supply
13.0
12.8
12.6
12.4
12.2
12.0
11.8
11.6
11.4
11.2
11.0
0
U
Output Voltage vs Load
20
LOAD CURRENT (mA)
40
60
80
LTC1263 • TA02
LTC1263
100
1

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LTC1263 Summary of contents

Page 1

... The active high TTL compatible Shutdown pin can be directly connected to a microprocessor. In the shutdown mode, the supply current typically drops to 0.5 A. The LTC1263 is available in an 8-pin SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. SHDN P ...

Page 2

... Note 3: All typicals are given at V Note 4: A higher value output capacitor can be used but the “turn-on” and “turn-off” time will increase proportionally INFORMATION ORDER PART TOP VIEW NUMBER 8 SHDN 7 GND LTC1263CS8 V 6 OUT PACKAGE = 125 C, = 150 MIN TYP MAX 11 ...

Page 3

... V CC 195 = 90mA V CC 190 185 180 –55 –35 – 105 TEMPERATURE ( C) Oscillator Frequency 25 45 105 –55 –35 – TEMPERATURE ( C) LTC1263 • TPC05 OUT . Connect to GND for OUT 5. 105 LTC1263 • TPC03 V 5.5V when CC 3 ...

Page 4

... C1 GND LTC1263 3 6 – OUT 4.75V TO 5.5V Figure 2. Timing Circuit SHDN V OUT C OUT R2 V DIV R3 S2 GND LTC1263 • BD HYST OUT 12V 1.4V 0V LTC1263 • F01 V SHDN V OUT LTC1263 • F02 ...

Page 5

... A. At the same time an and a reference OUT internal switch shorts the output OUT to reach 5.1V (see t is low, the LTC1263 exits shutdown and the charge pump ) of the compara- HYST operates to raise V reach the lower regulation limit of 11.4V (see the ...

Page 6

... MUST PULL MORE CURRENT OUT two diodes and two capacitors. Output voltages of 19V and – 7V can easily be obtained. In other words, the LTC1263 can power dual supply ( 5V) and single supply (15V) op amps. Dual Supply Voltage Output at 12V and – ...

Page 7

... TYP 0.014 – 0.019 (0.355 – 0.483) LTC1263 V OUT 12V LTC1263 • TA03 – 12V 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** (3.810 – 3.988 0.004 – ...

Page 8

... SGND PGND TM 22k Burst Mode OPERATION DEFEAT; USE IF REQUIRED COMMENTS 1.5V to 12V Supply Range, 95% Efficiency, V Adjustable V 1/2 Source Current as LTC1263, Cannot Short 600mA or 12V at 120mA, Use Inductor 120mA Output, Current Limit, Thermal Shutdown Fixed – 4.1V or Adjustable Output, No Inductors V OUT 12V 60mA V IN ...

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