LT1963 Series
1.5A, Low Noise,
Fast Transient Response
LDO Regulators
FEATURES
DESCRIPTIO
Optimized for Fast Transient Response
The LT 1963 series are low dropout regulators optimized
Output Current: 1.5A
for fast transient response. The devices are capable of
Dropout Voltage: 340mV
supplying 1.5A of output current with a dropout voltage of
Low Noise: 40V (10Hz to 100kHz)
340mV. Operating quiescent current is 1mA, dropping to
RMS
1mA Quiescent Current
<1A in shutdown. Quiescent current is well controlled; it
No Protection Diodes Needed
does not rise in dropout as it does with many other
Controlled Quiescent Current in Dropout
regulators. In addition to fast transient response, the
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
LT1963 regulators have very low output noise which
Adjustable Output from 1.21V to 20V
makes them ideal for sensitive RF supply applications.
<1A Quiescent Current in Shutdown
Output voltage range is from 1.21V to 20V. The LT1963
Stable with 10F Output Capacitor
regulators are stable with output capacitors as low as
Reverse Battery Protection
10F. Internal protection circuitry includes reverse battery
No Reverse Current
protection, current limiting, thermal limiting and reverse
Thermal Limiting
current protection. The devices are available in fixed
5-Lead TO-220, DD, 3-Lead SOT-223, 8-Lead SO
output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an
and 16-Lead TSSOP Packages
adjustable device with a 1.21V reference voltage. The
LT1963 regulators are available in 5-lead TO-220, DD,
U
APPLICATIO S
3-lead SOT-223, 8-lead SO, and Exposed Pad 16-lead
TSSOP packages.
3.3V to 2.5V Logic Power Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
Post Regulator for Switching Supplies
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6118263, 6144250.
TYPICAL APPLICATION
Dropout Voltage
400
350
3.3V to 2.5V Regulator
300
2.5V
250
IN OUT
1.5A
+ +
V > 3V 10F
10F 200
IN
LT1963-2.5
150
SHDN SENSE
100
GND
1963 TA01
50
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT CURRENT (A)
1963 TA02
1963fc
1
DROPOUT VOLTAGE (mV)
U
ULT1963 Series
ABSOLUTE AXI U RATI GS
(Note 1)
IN Pin Voltage ........................................................ 20V SHDN Pin Voltage ................................................. 20V
OUT Pin Voltage .................................................... 20V Output Short-Circuit Duration ......................... Indefinite
Input to Output Differential Voltage (Note 2) ......... 20V Operating Junction Temperature Range 40C to 125C
SENSE Pin Voltage ............................................... 20V Storage Temperature Range ................. 65C to 150C
ADJ Pin Voltage ...................................................... 7V Lead Temperature (Soldering, 10 sec).................. 300C
UUW
PACKAGE/ORDER I FOR ATIO
TOP VIEW
FRONT VIEW
FRONT VIEW
GND 1 16 GND
SENSE/
5 SENSE/ADJ* 5
ADJ*
NC 2 15 NC
4 OUT 4 OUT
OUT 3 14 IN
TAB IS
3
3 GND GND
GND OUT 4 13 IN
*PIN 6 = SENSE FOR LT1963-1.5/
17
2 IN
2 IN
LT1963-1.8/LT1963-2.5/
OUT 5 12 IN
1
1 SHDN SHDN
LT1963-3.3
SENSE/ADJ* 6 11 NC
= ADJ FOR LT1963
TAB IS T PACKAGE
Q PACKAGE
GND 7 10 SHDN
GND 5-LEAD PLASTIC TO-220
5-LEAD PLASTIC DD
GND 8 9 GND
*PIN 5 = SENSE FOR LT1963-1.5/LT1963-1.8/
*PIN 5 = SENSE FOR LT1963-1.5/LT1963-1.8/
FE PACKAGE
LT1963-2.5/LT1963-3.3
LT1963-2.5/LT1963-3.3
16-LEAD PLASTIC TSSOP
= ADJ FOR LT1963
= ADJ FOR LT1963
EXPOSED PAD (PIN 17) IS GND. MUST BE
SOLDERED TO THE PCB.
T = 150C, = 50C/ W
T = 150C, = 30C/ W JMAX JA
JMAX JA
T = 150C, = 38C/ W
JMAX JA
ORDER PART NUMBER ORDER PART NUMBER ORDER PART NUMBER FE PART MARKING
LT1963EQ LT1963ET LT1963EFE 1963EFE
LT1963EQ-1.5 LT1963ET-1.5 LT1963EFE-1.5 1963EFE15
LT1963EQ-1.8 LT1963ET-1.8 LT1963EFE-1.8 1963EFE18
LT1963EQ-2.5 LT1963ET-2.5 LT1963EFE-2.5 1963EFE25
LT1963EQ-3.3 LT1963ET-3.3 LT1963EFE-3.3 1963EFE33
TOP VIEW
FRONT VIEW
OUT 1 8 IN
3 OUT
SENSE/ADJ* 2 7 GND
TAB IS GND 3 6 GND
2
GND
GND
NC 4 5 SHDN
1
IN S8 PACKAGE
8-LEAD PLASTIC SO
ST PACKAGE
*PIN 2 = SENSE FOR LT1963-1.5/LT1963-1.8/
3-LEAD PLASTIC SOT-223
LT1963-2.5/LT1963-3.3
= ADJ FOR LT1963
T = 150C, = 50C/ W
JMAX JA
T = 150C, = 70C/ W
JMAX JA
ORDER PART NUMBER ST PART MARKING ORDER PART NUMBER S8 PART MARKING
LT1963EST-1.5 196315
LT1963ES8 1963
LT1963EST-1.8 196318
LT1963ES8-1.5 196315
LT1963EST-2.5 196325
LT1963ES8-1.8 196318
LT1963EST-3.3 196333
LT1963ES8-2.5 196325
LT1963ES8-3.3 196333
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: