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Linear Technology Electronic Components Datasheet

LTC3025IDC-2 Datasheet

500mA Micropower VLDO Linear Regulators

No Preview Available !

Features
n Wide Input Voltage Range: 0.9V to 5.5V
n Stable with Ceramic Capacitors
n Very Low Dropout: 85mV at 500mA
n Adjustable Output Range: 0.4V to 3.6V (LTC3025-1)
n Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3),
1.8V (LTC3025-4)
n ±2% Voltage Accuracy over Temperature,
Supply and Load
n Low Noise: 80µVRMS (10Hz to 100kHz)
n BIAS Voltage Range: 2.5V to 5.5V
n Fast Transient Recovery
n Shutdown Disconnects Load from VIN and VBIAS
n Low Operating Current: IIN = 4µA, IBIAS = 50µA Typ
n Low Shutdown Current: IIN = 1µA, IBIAS = 0.01µA Typ
n Output Current Limit
n Thermal Overload Protection
n Available in 6-Lead (2mm × 2mm) DFN Package
Applications
n Low Power Handheld Devices
n Low Voltage Logic Supplies
n DSP Power Supplies
n Cellular Phones
n Portable Electronic Equipment
n Handheld Medical Instruments
n Post Regulator for Switching Supply Noise Rejection
LTC3025-1/LTC3025-2/
LTC3025-3/LTC3025-4
500mA Micropower
VLDO Linear Regulators
Description
The LTC®3025-X is a micropower, VLDO™ (very low drop-
out) linear regulator which operates from input voltages as
low as 0.9V. The device is capable of supplying 500mA of
output current with a typical dropout voltage of only 85mV.
A BIAS supply is required to run the internal reference and
LDO circuitry while output current comes directly from the
IN supply for high efficiency regulation. The LTC3025-1
features an adjustable output with a low 0.4V reference
while the LTC3025-2, LTC3025-3, and LTC3025-4 have
fixed 1.2V, 1.5V and 1.8V output voltages respectively.
The LTC3025-X’s low quiescent current makes it an ideal
choice for use in battery-powered systems. For 3-cell NiMH
and single cell Li-Ion applications, the BIAS voltage can
be supplied directly from the battery while the input can
come from a high efficiency buck regulator, providing a
high efficiency, low noise output.
Other features include high output voltage accuracy,
excellent transient response, stability with ultralow ESR
ceramic capacitors as small as 1µF, short-circuit and
thermal overload protection and output current limiting.
The LTC3025-X is available in a tiny, low profile (0.75mm)
6-lead DFN (2mm × 2mm) package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO
and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 7224204, 7218082.
Typical Application
1.2V Output Voltage from 1.5V Input Supply
Li-Ion
OR
3-CELL
NiMH
1.5V HIGH
EFFICIENCY 1.5V
DC/DC
BUCK
0.1µF
0.1µF
OFF ON
BIAS
OUT
LTC3025-2
IN
SENSE
SHDN
GND
VOUT = 1.2V
1µF IOUT ≤ 500mA
30251234 TA01
1MHz VIN Supply Rejection
50
45
COUT = 10µF
40
35
COUT = 1µF
30
25
20
15
10
5 BIAS = 3.6V
VOUT = 1.2V
0
1.2 1.4 1.6
1.8 2.0
VIN (V)
IOUT = 100mA
IOUT = 300mA
2.2 2.4 2.6
30251234 TA01b
30251234ff
1


Linear Technology Electronic Components Datasheet

LTC3025IDC-2 Datasheet

500mA Micropower VLDO Linear Regulators

No Preview Available !

LTC3025-1/LTC3025-2/
LTC3025-3/LTC3025-4
Absolute Maximum Ratings
(Notes 1, 2)
VBIAS, VIN to GND.......................................... –0.3V to 6V
SHDN to GND................................................ –0.3V to 6V
SENSE, ADJ to GND...................................... –0.3V to 6V
VOUT.........................................–0.3V to VIN + 0.3V or 6V
Operating Junction Temperature Range
(Note 3)................................................... –40°C to 125°C
Storage Temperature Range.................... –65°C to 125°C
Output Short-Circuit Duration........................... Indefinite
Pin Configuration
TOP VIEW
BIAS 1
GND 2
7
IN 3
6 SHDN
5 ADJ/SENSE*
4 OUT
DC6 PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 102°C/W, θJC = 20°C/W
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
*ADJ FOR LTC3025-1, SENSE FOR LTC3025-2, LTC3025-3, LTC3025-4
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3025EDC-1#PBF
LTC3025EDC-1#TRPBF LDDW
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-1#PBF
LTC3025IDC-1#TRPBF LDDW
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-2#PBF
LTC3025EDC-2#TRPBF LDMK
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-2#PBF
LTC3025IDC-2#TRPBF LDMK
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-3#PBF
LTC3025EDC-3#TRPBF LDQS
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-3#PBF
LTC3025IDC-3#TRPBF LDQS
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-4#PBF
LTC3025EDC-4#TRPBF LDPQ
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-4#PBF
LTC3025IDC-4#TRPBF LDPQ
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3025EDC-1
LTC3025EDC-1#TR
LDDW
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-1
LTC3025IDC-1#TR
LDDW
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-2
LTC3025EDC-2#TR
LDMK
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-2
LTC3025IDC-2#TR
LDMK
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-3
LTC3025EDC-3#TR
LDQS
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-3
LTC3025IDC-3#TR
LDQS
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025EDC-4
LTC3025EDC-4#TR
LDPQ
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LTC3025IDC-4
LTC3025IDC-4#TR
LDPQ
6-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
2
30251234ff


Part Number LTC3025IDC-2
Description 500mA Micropower VLDO Linear Regulators
Maker Linear
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LTC3025IDC-2 Datasheet PDF






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