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Linear Technology Electronic Components Datasheet

LT3012 Datasheet

4V to 80V Low Dropout Micropower Linear Regulator

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FEATURES
n Wide Input Voltage Range: 4V to 80V
n Low Quiescent Current: 40μA
n Low Dropout Voltage: 400mV
n Output Current: 250mA
n No Protection Diodes Needed
n Adjustable Output from 1.24V to 60V
n 1μA Quiescent Current in Shutdown
n Stable with 3.3μF Output Capacitor
n Stable with Aluminum, Tantalum or Ceramic
Capacitors
n Reverse-Battery Protection
n No Reverse Current Flow from Output to Input
n Thermal Limiting
n Thermally Enhanced 16-Lead TSSOP and
12-Pin (4mm × 3mm) DFN Packages
APPLICATIONS
n Low Current High Voltage Regulators
n Regulator for Battery-Powered Systems
n Telecom Applications
n Automotive Applications
LT3012
250mA, 4V to 80V
Low Dropout
Micropower Linear Regulator
DESCRIPTION
The LT®3012 is a high voltage, micropower low dropout
linear regulator. The device is capable of supplying 250mA of
output current with a dropout voltage of 400mV. Designed
for use in battery-powered or high voltage systems, the low
quiescent current (40μA operating and 1μA in shutdown)
makes the LT3012 an ideal choice. Quiescent current is
also well controlled in dropout.
Other features of the LT3012 include the ability to operate
with very small output capacitors. The regulator is stable
with only 3.3μF on the output while most older devices
require between 10μF and 100μF for stability. Small ce-
ramic capacitors can be used without any need for series
resistance (ESR) as is common with other regulators.
Internal protection circuitry includes reverse-battery
protection, current limiting, thermal limiting and reverse
current protection.
The device is available with an adjustable output with a
1.24V reference voltage. The LT3012 regulator is available
in the 16-lead TSSOP and 12 pin low profile (0.75mm)
(4mm × 3mm) DFN packages with an exposed pad for
enhanced thermal handling capability.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
5V Supply with Shutdown
VIN
5.4V TO
80V
IN OUT
LT3012
1μF
SHDN ADJ
GND
VSHDN
<0.3V
>2.0V
OUTPUT
OFF
ON
750k
VOUT
5V
250mA
3.3μF
249k
3012 TA01
400
350
300
250
200
150
100
50
0
0
Dropout Voltage
50 100 150 200
OUTPUT CURRENT (mA)
250
3012 TA02
3012fd
1


Linear Technology Electronic Components Datasheet

LT3012 Datasheet

4V to 80V Low Dropout Micropower Linear Regulator

No Preview Available !

LT3012www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS (Note 1)
IN Pin Voltage .........................................................±80V
OUT Pin Voltage......................................................±60V
IN to OUT Differential Voltage .................................±80V
ADJ Pin Voltage ........................................................±7V
SHDN Pin Input Voltage..........................................±80V
Output Short-Circuit Duration .......................... Indefinite
Storage Temperature Range
TSSOP Package ................................. –65°C to 150°C
DFN Package...................................... –65°C to 125°C
Operating Junction Temperature Range
(Notes 3, 10, 11)
LT3012E............................................. –40°C to 125°C
LT3012HFE......................................... –40°C to 140°C
Lead Temperature (FE16 Soldering, 10 sec) ......... 300°C
PIN CONFIGURATION
TOP VIEW
NC 1
OUT 2
OUT 3
ADJ 4
GND 5
NC 6
12 NC
11 IN
10 IN
13
9 NC
8 SHDN
7 NC
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W, θJC = 16°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
GND 1
NC 2
OUT 3
OUT 4
ADJ 5
GND 6
NC 7
GND 8
TOP VIEW
16 GND
15 NC
14 IN
13 IN
17
12 NC
11 SHDN
10 NC
9 GND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 140°C, θJA = 40°C/W, θJC = 16°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3012EDE#PBF
LT3012EDE#TRPBF
3012
12-Lead (4mm × 3mm) Plastic DFN
LT3012EFE#PBF
LT3012EFE#TRPBF
3012EFE
16-Lead Plastic TSSOP
LT3012HFE#PBF
LT3012HFE#TRPBF
3012HFE
16-Lead Plastic TSSOP
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LT3012EDE
LT3012EDE#TR
3012
12-Lead (4mm × 3mm) Plastic DFN
LT3012EFE
LT3012EFE#TR
3012EFE
16-Lead Plastic TSSOP
LT3012HFE
LT3012HFE#TR
3012HFE
16-Lead Plastic TSSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 140°C
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 140°C
3012fd
2


Part Number LT3012
Description 4V to 80V Low Dropout Micropower Linear Regulator
Maker Linear Technology
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LT3012 Datasheet PDF





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