IC LDO 3A ADJ SHUTDOWN DDPAK-5

LT1529IQ#PBF

Manufacturer Part NumberLT1529IQ#PBF
DescriptionIC LDO 3A ADJ SHUTDOWN DDPAK-5
ManufacturerLinear Technology
LT1529IQ#PBF datasheet
 

Specifications of LT1529IQ#PBF

Regulator TopologyPositive AdjustableVoltage - Output3.3 ~ 14.15 V
Voltage - Input3.8 ~ 15 VVoltage - Dropout (typical)0.6V @ 3A
Number Of Regulators1Current - Output3A
Current - Limit (min)3.2AOperating Temperature-45°C ~ 125°C
Mounting TypeSurface MountPackage / CaseTO-263-5, D²Pak (5 leads + Tab), TO-263BA
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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FEATURES
Dropout Voltage: 0.6V at I
= 3A
OUT
Output Current: 3A
Quiescent Current: 50µA
No Protection Diodes Needed
Adjustable Output from 3.8V to 14V
3.3V and 5V Fixed Output Voltages
Controlled Quiescent Current in Dropout
Shutdown I
= 16µA
Q
Stable with 22µF Output Capacitor
Reverse Battery Protection
No Reverse Current
Thermal Limiting
U
APPLICATIO S
High Efficiency Regulator
Regulator for Battery-Powered Systems
Post Regulator for Switching Supplies
5V to 3.3V Logic Regulator
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
5V Supply with Shutdown
5
1
V
OUTPUT
IN
LT1529-5
V
> 5.5V
IN
4
2
SHDN
SENSE
GND
3
V
(PIN 4)
OUTPUT
SHDN
< 0.25
OFF
> 2.8
ON
NC
ON
3A Low Dropout Regulators
DESCRIPTIO
®
The LT
1529/LT1529-3.3/LT1529-5 are 3A low dropout
regulators with micropower quiescent current and shut-
down. The devices are capable of supplying 3A of output
current with a dropout voltage of 0.6V. Designed for use
in battery-powered systems, the low quiescent current,
50µA operating and 16µA in shutdown, make them an
ideal choice. The quiescent current is well controlled; it
does not rise in dropout as it does with many other low
dropout PNP regulators.
Other features of the LT1529 /LT1529-3.3/LT1529-5 in-
clude the ability to operate with small output capacitors.
They are stable with 22µF on the output while most older
devices require up to 100µF for stability. Small ceramic
capacitors can be used, enhancing manufacturabiltiy.
Also the input may be connected to voltages lower than the
output voltage, including negative voltages, without re-
verse current flow from output to input. This makes the
LT1529/LT1529-3.3/LT1529-5 ideal for backup power
situations where the output is held high and the input is at
ground or reversed. Under these conditions, only 16µA
will flow from the OUTPUT pin to ground. The devices are
available in 5-lead TO-220 and 5-lead DD packages.
0.6
0.5
5V
+
3A
0.4
22µF
0.3
0.2
0.1
0
LT1529 • TA01
LT1529
LT1529-3.3/LT1529-5
with Micropower
Quiescent Current
and Shutdown
U
Dropout Voltage
0
1.0
1.5
2.0
2.5
3.0
0.5
OUTPUT CURRENT (A)
LT1529 • TA02
152935fb
1

LT1529IQ#PBF Summary of contents

  • Page 1

    ... High Efficiency Regulator ■ Regulator for Battery-Powered Systems ■ Post Regulator for Switching Supplies ■ 3.3V Logic Regulator , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATIO 5V Supply with Shutdown ...

  • Page 2

    LT1529 LT1529-3.3/LT1529 BSOLUTE Input Voltage ...................................................... ±15V* OUTPUT Pin Reverse Current .............................. 10mA SENSE Pin Current .............................................. 10mA ADJ Pin Current ................................................... 10mA SHDN Pin Input Voltage (Note 2) .............. 6.5V, – 0.6V ...

  • Page 3

    ELECTRICAL C HARA TERISTICS C The ● denotes specifications which apply over the operating temperature range, otherwise specificatons are at T PARAMETER Dropout Voltage (Note 6) GND Pin Current (Note 7) ADJ Pin Bias Current (Notes 5, 9) Shutdown Threshold ...

  • Page 4

    LT1529 LT1529-3.3/LT1529 TYPICAL PERFOR A Guaranteed Dropout Voltage 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 = TEST POINT 0 0 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) LT1529 • G01 LT1529-3.3 Quiescent Current 250 ...

  • Page 5

    W U TYPICAL PERFOR A LT1529-3.3 GND Pin Current 5 25° OUT SENSE *FOR V = 3.3V OUT R = 6.6Ω 4.0 LOAD I = 500mA* LOAD 3.5 3 330Ω LOAD ...

  • Page 6

    LT1529 LT1529-3.3/LT1529 TYPICAL PERFOR A SHDN Pin Current SHDN – 125 –25 100 TEMPERATURE (°C) LT1529 • G19 Reverse ...

  • Page 7

    W U TYPICAL PERFOR A Load Regulation 5 LT1529-5 0 LT1529-3.3 –5 LT1529 –10 – (NOMINAL OUT –20 = 100mA to 3A ∆I LOAD ADJ OUT –25 – 50 – 25 ...

  • Page 8

    LT1529 LT1529-3.3/LT1529 CTIO S function of voltage appears in the Typical Performance Characteristics. If the SHDN pin is not used it can be left open circuit. The device will be active, output on, if the ...

  • Page 9

    PPLICATI S I FOR ATIO Thermal Considerations The power handling capability of the device will be limited by the maximum rated junction temperature (125°C). The power dissipated by the device will be made up of two ...

  • Page 10

    LT1529 LT1529-3.3/LT1529 PPLICATI S I FOR ATIO micropower device and output transient response will be a function of output capacitance. See the Transient Re- sponse curves in the Typical Performance Characteristics. Larger values of output capacitance ...

  • Page 11

    ... RECOMMENDED SOLDER PAD LAYOUT FOR THICKER SOLDER PASTE APPLICATIONS 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 circuits as described herein will not infringe on existing patent rights will typically drop to less than 2µ ...

  • Page 12

    ... TYP .095 – .115 (2.413 – 2.921) .155 – .195* (3.937 – 4.953) .013 – .023 (0.330 – 0.584) * MEASURED AT THE SEATING PLANE T5 (TO-220) 0801 Low Dropout Regulator LT/LT 0305 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1995 152935fb ...