LTC3025EDC#TRMPBF Linear Technology, LTC3025EDC#TRMPBF Datasheet

IC REG VLDO 300MA MICROPWR 6DFN

LTC3025EDC#TRMPBF

Manufacturer Part Number
LTC3025EDC#TRMPBF
Description
IC REG VLDO 300MA MICROPWR 6DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC3025EDC#TRMPBF

Regulator Topology
Positive Adjustable
Voltage - Output
0.4 ~ 3.6 V
Voltage - Input
0.9 ~ 5.5 V
Voltage - Dropout (typical)
0.045V @ 300mA
Number Of Regulators
1
Current - Output
300mA (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
6-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
LTC3025EDC#PBF
LTC3025EDC#PBF

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Part Number
Manufacturer
Quantity
Price
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Part Number:
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Part Number:
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Manufacturer:
LT
Quantity:
14 204
FEATURES
APPLICATIONS
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n
n
n
n
n
n
n
n
n
n
n
n
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n
n
n
n
3-CELL
Li-Ion
NiMH
OR
Wide Input Voltage Range: 0.9V to 5.5V
Stable with Ceramic Capacitors
Very Low Dropout: 45mV at 300mA
Adjustable Output Range: 0.4V to 3.6V
±2% Voltage Accuracy over Temperature
Supply Load
Low Noise: 80μV
BIAS Voltage Range: 2.5V to 5.5V
Fast Transient Recovery
Shutdown Disconnects Load from V
Low Operating Current: I
Low Shutdown Current: I
Output Current Limit
Thermal Overload Protection
Available in 6-Lead (2mm × 2mm) DFN Package
Low Power Handheld Devices
Low Voltage Logic Supplies
DSP Power Supplies
Cellular Phones
Portable Electronic Equipment
Handheld Medical Instruments
Post Regulator for Switching Supply Noise Rejection
TYPICAL APPLICATION
EFFICIENCY
1.5V HIGH
DC/DC
BUCK
1.2V Output Voltage from 1.5V Input Supply
1.5V
RMS
OFF ON
0.1μF
0.1μF
(10Hz to 100kHz)
IN
IN
BIAS
IN
SHDN
= 4μA, I
= 1μA, I
LTC3025
GND
OUT
ADJ
BIAS
BIAS
IN
and V
= 50μA Typ
= 0.01μA Typ
80.6k
40.2k
3025 TA01
BIAS
1μF
V
I
OUT
OUT
≤ 300mA
= 1.2V
DESCRIPTION
The LTC
out) linear regulator which operates from input voltages as
low as 0.9V. The device is capable of supplying 300mA of
output current with a typical dropout voltage of only 45mV.
A BIAS supply is required to run the internal reference and
LDO circuitry while output current comes directly from
the IN supply for high effi ciency regulation. The low 0.4V
internal reference voltage allows the LTC3025 output to
be programmed to much lower voltages than available in
common LDOs (range of 0.4V to 3.6V). The output voltage
is programmed via two ultrasmall SMD resistors.
The LTC3025’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 effi ciency buck regulator, providing
a high effi ciency, 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 is available in a tiny, low profi le (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.
VLDO Linear Regulator
®
3025 is a micropower, VLDO
50
45
40
35
30
25
20
15
10
300mA Micropower
5
0
1.2
1MHz V
BIAS = 3.6V
V
OUT
1.4
= 1.2V
IN
1.6
Supply Rejection
C
C
OUT
1.8
OUT
V
IN
= 10μF
= 1μF
(V)
2.0
I
I
2.2
OUT
OUT
= 100mA
= 300mA
TM
2.4
LTC3025
3025 TA01b
(very low drop-
2.6
3025fd
1

Related parts for LTC3025EDC#TRMPBF

LTC3025EDC#TRMPBF Summary of contents

Page 1

... The LTC3025 is available in a tiny, low profi le (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 ...

Page 2

LTC3025 ABSOLUTE MAXIMUM RATINGS (Notes GND ......................................... –0. BIAS IN SHDN to GND ............................................... –0. ADJ to GND .................................................. –0. ........................................–0. OUT Operating Junction Temperature ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 0.1μF (all capacitors ceramic) unless otherwise noted. (Note 3) BIAS PARAMETER Dropout Voltage (Notes OUT Dropout Voltage (Note ...

Page 4

LTC3025 TYPICAL PERFORMANCE CHARACTERISTICS V No Load Operating Current BIAS V = 0.8V OUT 12 10 125°C 8 85°C 6 25°C –40° 0.5 1.5 2.5 3.5 4.5 V (V) IN 3025 G04 ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS 3MHz V Supply Rejection 10μF OUT 1μF OUT 3.6V 5 BIAS V = 1.2V OUT 0 1.2 1.6 1.8 2.0 1.4 ...

Page 6

LTC3025 BLOCK DIAGRAM BIAS 1 SHDN 6 GND 2 APPLICATIONS INFORMATION Operation (Refer to Block Diagram) The LTC3025 is a micropower, VLDO (very low dropout) linear regulator which operates from input voltages as low as 0.9V. The device provides a ...

Page 7

APPLICATIONS INFORMATION using the formula in Figure 2. Note that in shutdown the output is turned off and the divider current will be zero once C is discharged. OUT The LTC3025 operates at a relatively high gain of –0.7μV/ mA ...

Page 8

LTC3025 APPLICATIONS INFORMATION temperature range. The X5R and X7R dielectrics result in more stable characteristics and are usually more suitable for use as the output capacitor. The X7R type has better stability across temperature, while the X5R is less expensive ...

Page 9

APPLICATIONS INFORMATION The LTC3025 will cycle in and out of thermal shutdown without latch-up or damage until the overstress condition is removed. Long term overstress (T avoided as it can degrade the performance or shorten the life of the part. ...

Page 10

LTC3025 PACKAGE DESCRIPTION 2.55 0.05 0.61 0.05 1.15 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 BAR TOP MARK (SEE NOTE Package 6-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703 Rev ...

Page 11

... Updated graph G11 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. l denotes” statement in Electrical Characteristics section ...

Page 12

... Package. = 1.22V 0.30V 25μA, I < 1μ RMSP-P = 1.25V 0.08V 40μA, I < 1μ 1.22V 0.27V 30μA, I < 1μ RMSP-P = –1.21V 0.34V 30μA, I < 3μ 0.20V 0.15V 120μA, I < 3μ 0111 REV D • PRINTED IN USA © LINEAR TECHNOLOGY CORPORA TION 2004 3025fd ...

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