LT1764AEQ-3.3#PBF Linear Technology, LT1764AEQ-3.3#PBF Datasheet

IC LDO LOW NOISE 3A 3.3V DDPAK-5

LT1764AEQ-3.3#PBF

Manufacturer Part Number
LT1764AEQ-3.3#PBF
Description
IC LDO LOW NOISE 3A 3.3V DDPAK-5
Manufacturer
Linear Technology
Datasheet

Specifications of LT1764AEQ-3.3#PBF

Regulator Topology
Positive Fixed
Voltage - Output
3.3V
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
Surface Mount
Package / Case
TO-263-5, D²Pak (5 leads + Tab), TO-263BA
Primary Input Voltage
20V
Output Voltage Fixed
3.3V
Dropout Voltage Vdo
340mV
No. Of Pins
5
Output Current
3A
Operating Temperature Range
-40°C To +125°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1764AEQ-3.3#PBFLT1764AEQ-3.3
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1764AEQ-3.3#PBF
Manufacturer:
LINEAR43
Quantity:
750
Company:
Part Number:
LT1764AEQ-3.3#PBFLT1764AEQ-3.3#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1764AEQ-3.3#PBFLT1764AEQ-3.3#TRPBF
0
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*
Stable with Ceramic Capacitors*
Reverse Battery Protection
No Reverse Current
Thermal Limiting
> 3V
+
10µF*
3.3V
µ
V
U
RMS
IN
to 2.5V
IN
SHDN
LT1764A-2.5
(10Hz to 100kHz)
GND
OUT
SENSE
1764 TA01
OUT
Regulator
U
*TANTALUM,
+
CERAMIC OR
ALUMINUM ELECTROLYTIC
10µF*
2.5V
3A
DESCRIPTIO
The LT
fast transient response. The device is capable of supplying
3A of output current with a dropout voltage of 340mV.
Operating 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 LT1764A 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 LT1764A
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 LT1764A regu-
lators are available in 5-lead TO-220 and DD packages, and
16-lead FE packages.
All other trademarks are the property of their respective owners.
*See Applications Information Section.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
1764A is a low dropout regulator optimized for
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
LT1764A Series
2.0
2.5
1764 TA02
3.0
1764afb
1

Related parts for LT1764AEQ-3.3#PBF

LT1764AEQ-3.3#PBF Summary of contents

Page 1

... The LT1764A regu- lators are available in 5-lead TO-220 and DD packages, and 16-lead FE packages. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *See Applications Information Section. 400 ...

Page 2

... JMAX JA ORDER PART NUMBER LT1764AEQ LT1764AEQ-1.5 LT1764AEQ-1.8 LT1764AEQ-2.5 LT1764AEQ-3.3 LT1764AMPQ Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges. ...

Page 3

ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS LT1764A-2.5 V LT1764A-3.3 V ADJ Pin Voltage LT1764A (Notes 3, 4) Line Regulation LT1764A-1.5 LT1764A-1.8 LT1764A-2.5 LT1764A-3.3 LT1764A (Note 3) ...

Page 4

LT1764A Series ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS Current Limit Grade: LT1764A; LT1764A-1.5; = 2.7V, ∆ Grade: ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Quiescent Current 1.4 LT1764A-1.5/1.8/2.5/3.3 1.2 1.0 LT1764A 0.8 0.6 0 ∞ 0 SHDN 100 125 –50 ...

Page 6

LT1764A Series W U TYPICAL PERFOR A CE CHARACTERISTICS LT1764A-3.3 Quiescent Current 25°C J ∞ SHDN ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS LT1764A-2.5 GND Pin Current 200 T = 25° SHDN IN *FOR V = 2.5V OUT 160 R = 0.83Ω 3A* 120 3.57Ω ...

Page 8

LT1764A Series W U TYPICAL PERFOR A CE CHARACTERISTICS Current Limit –50° 125° 25° ...

Page 9

W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Output Noise vs Load Current (10Hz to 100kHz 10µF OUT LT1764A-1 0.0001 0.001 0.01 LOAD CURRENT (A) LT1764A-3.3 Transient Response 0.2 ...

Page 10

LT1764A Series CTIO S DD/TO-220/TSSOP SHDN (Pin 1/1/10): Shutdown. The SHDN pin is used to put the LT1764A regulators into a low power shutdown state. The output will be off when the SHDN pin is ...

Page 11

U U APPLICATIO S I FOR ATIO The LT1764A 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

LT1764A Series U U APPLICATIO S I FOR ATIO ing the capacitor value improves the stability and reduces the ringing. Table 1 gives some recommended values of ESR to minimize ringing caused by fast, hard current transitions. Table 1. Capacitor ...

Page 13

F03 Figure 1764A F04 20µs/DIV Figure 20µs/DIV 1764A F05 Figure 1.2V OUT WITH ...

Page 14

LT1764A Series U U APPLICATIONS INFORMATION Ceramic Capacitors Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior over temperature and applied voltage. The most common ...

Page 15

U U APPLICATIONS INFORMATION current in the output capacitor. Worst case ripple current will occur if the output load is a high frequency (>100kHz) square wave with a high peak value and fast edges (< 1µs). Measured ...

Page 16

LT1764A Series U U APPLICATIONS INFORMATION all sources of thermal resistance from junction to ambient. Additional heat sources mounted nearby must also be considered. For surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the ...

Page 17

U U APPLICATIONS INFORMATION In situations where the ADJ pin is connected to a resistor divider that would pull the ADJ pin above its 7V clamp voltage if the output is pulled high, the ADJ pin input current must be ...

Page 18

LT1764A Series U TYPICAL APPLICATIO > 2.7V IN 10µF PACKAGE DESCRIPTION 0.060 0.256 (1.524) (6.502) 0.060 0.183 (1.524) (4.648) 0.075 (1.905) 0.300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK ...

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. U ...

Page 20

... LT1963A 1.5A, Low Noise, Fast Transient Response LDO LT1964 200mA, Low Noise, Negative LDO Micropower Regulator OPTI-LOOP is a registered trademark of Linear Technology Corporation. UltraFast and ThinSOT are trademarks 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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