LT1764ET-2.5 Linear Technology, LT1764ET-2.5 Datasheet

IC REG LDO 2.5V 3A TO220-5

LT1764ET-2.5

Manufacturer Part Number
LT1764ET-2.5
Description
IC REG LDO 2.5V 3A TO220-5
Manufacturer
Linear Technology
Datasheet

Specifications of LT1764ET-2.5

Regulator Topology
Positive Fixed
Voltage - Output
2.5V
Voltage - Input
Up to 20V
Voltage - Dropout (typical)
0.34V @ 3A
Number Of Regulators
1
Current - Output
3A
Current - Limit (min)
3.1A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
V
IN
3.3V to 2.5V Logic Power Supply
Post Regulator for Switching Supplies
Optimized for Fast Transient Response
Output Current: 3A
Dropout Voltage: 340mV at 3A
Low Noise: 40
1mA Quiescent Current
Wide Input Voltage Range: 2.7V to 20V
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
Adjustable Output from 1.21V to 20V
< 1µA Quiescent Current in Shutdown
Stable with 10µF Output Capacitor
Reverse Battery Protection
No Reverse Current
Thermal Limiting
Available in 5-Lead TO-220, DD and 16-Lead
TSSOP Packages
> 3V
+
10µF
3.3V
µ
V
U
RMS
IN
to 2.5V
IN
SHDN
LT1764-2.5
(10Hz to 100kHz)
GND
OUT
SENSE
OUT
Regulator
U
+
10µF
1764 TA01
2.5V
3A
DESCRIPTIO
The LT
transient response. The device is capable of supplying 3A
of output current with a dropout voltage of 340mV. Oper-
ating quiescent current is 1mA, dropping to < 1µA in
shutdown. Quiescent current is well controlled; it does not
rise in dropout as it does with many other regulators. In
addition to fast transient response, the LT1764 has very
low output voltage noise which makes the device ideal for
sensitive RF supply applications.
Output voltage range is from 1.21V to 20V. The LT1764
regulators are stable with output capacitors as low as 10µF.
Internal protection circuitry includes reverse battery pro-
tection, current limiting, thermal limiting and reverse cur-
rent protection. The device is available in fixed output
voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable
device with a 1.21V reference voltage. The LT1764 regu-
lators are available in 5-lead TO-220, DD and Exposed Pad
16-lead TSSOP packages.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6144250, 6118263.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1764 is a low dropout regulator optimized for fast
400
350
300
250
200
150
100
Response, Low Noise,
50
0
0
0.5
U
3A, Fast Transient
Dropout Voltage
LOAD CURRENT (A)
1.0
LDO Regulators
1.5
2.0
LT1764 Series
2.5
1764 TA02
3.0
1764fb
1

Related parts for LT1764ET-2.5

LT1764ET-2.5 Summary of contents

Page 1

... The LT1764 regu- lators are available in 5-lead TO-220, DD and Exposed Pad 16-lead TSSOP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6144250, 6118263. ...

Page 2

... ADJ* 4 OUT 3 GND SHDN TAB IS T PACKAGE GND 5-LEAD PLASTIC TO-220 *PIN 5 = SENSE FOR LT1764-1.5/LT1764-1.8/ LT1764-2.5/LT1764-3.3 = ADJ FOR LT1764 = 150°C, θ 50°C/ W JMAX JA ORDER PART NUMBER LT1764ET LT1764ET-1.5 LT1764ET-1.8 LT1764ET-2.5 LT1764ET-3.3 TOP VIEW GND 1 16 GND OUT OUT OUT SENSE/ADJ* ...

Page 3

ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS Minimum Input Voltage I = 0.5A LOAD (Notes 3, 11 1.5A LOAD I = 2.7A, 110°C < T ...

Page 4

LT1764 Series ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS GND Pin Current I = 0mA LOAD 1mA IN OUT(NOMINAL) LOAD ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Typical Dropout Voltage 600 500 400 T = 125°C J 300 200 T = 25°C J 100 0 0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT (A) 1764 G01 Quiescent Current 1.4 ...

Page 6

LT1764 Series W U TYPICAL PERFOR A CE CHARACTERISTICS LT1764-2.5 Quiescent Current 25°C J ∞ SHDN ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS LT1764-3.3 GND Pin Current 200 T = 25° SHDN IN *FOR V = 3.3V OUT 160 R = 1.1Ω 3A* 120 2.2Ω ...

Page 8

LT1764 Series W U TYPICAL PERFOR A CE CHARACTERISTICS Current Limit –50 – TEMPERATURE (°C) Reverse Output Current 1 0 1.21V (LT1764) OUT V ...

Page 9

W U TYPICAL PERFOR A CE CHARACTERISTICS Load Regulation –5 LT1764-1.8 –10 LT1764-2.5 –15 –20 ∆I = 1mA 2.7V (LT1764) IN – OUT(NOM) (LT1764-1.8/-2.5/-3.3) –30 – ...

Page 10

LT1764 Series CTIO S (DD and TO-220/TSSOP) SHDN (Pin 1/Pin 10): Shutdown. The SHDN pin is used to put the LT1764 regulators into a low power shutdown state. The output will be off when the ...

Page 11

U U APPLICATIO S I FOR ATIO The LT1764 series are 3A low dropout regulators opti- mized for fast transient response. The devices are capable of supplying dropout voltage of 340mV. The low operating quiescent current (1mA) ...

Page 12

LT1764 Series U U APPLICATIO S I FOR ATIO 20 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 0 X5R –20 –40 –60 Y5V –80 –100 BIAS VOLTAGE (V) Figure 3. Ceramic Capacitor ...

Page 13

U U APPLICATIONS INFORMATION Thermal Considerations The power handling capability of the device is limited by the maximum rated junction temperature (125°C). The power dissipated by the device is made up of two components: 1. Output current multiplied by the ...

Page 14

LT1764 Series U U APPLICATIONS INFORMATION Protection Features The LT1764 regulators incorporate several protection features which make them ideal for use in battery-powered circuits. In addition to the normal protection features associated with monolithic regulators, such as current limiting and ...

Page 15

U TYPICAL APPLICATIO S SCR Preregulator Provides Efficiency Over Line Variations L2 10V AC AT 115V IN 90V AC TO 140V AC 10V AC AT 115V IN 1N4002 “SYNC” 1N4002 TO + ALL “V ” + POINTS 22µF L1: COILTRONICS ...

Page 16

LT1764 Series U TYPICAL APPLICATIO > 2.7V IN 10µF 16 Adjustable Current Source R5 0.01Ω LT1004-1.2 SHDN 40.2k 2.2k 2. ADJUST R1 FOR CONSTANT CURRENT ...

Page 17

PACKAGE DESCRIPTION .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK .067 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCH/(MILLIMETER) 2. DRAWING NOT ...

Page 18

LT1764 Series PACKAGE DESCRIPTION 0.390 – 0.415 (9.906 – 10.541) 0.230 – 0.270 (5.842 – 6.858) 0.460 – 0.500 (11.684 – 12.700) 0.330 – 0.370 (8.382 – 9.398) 0.067 BSC 0.028 – 0.038 (1.70) (0.711 – 0.965 ...

Page 19

... DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 16-Lead Plastic TSSOP (4 ...

Page 20

... LT1962 300mA, Low Noise, LDO Micropower Regulator LT1963 1.5A, Low Noise, Fast Transient Response LDO UltraFast is a trademark of Linear Technology Corporation. OPTI-LOOP is a registered trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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