lt3027emse-trpbf Linear Technology Corporation, lt3027emse-trpbf Datasheet

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lt3027emse-trpbf

Manufacturer Part Number
lt3027emse-trpbf
Description
Dual 100ma, Low Dropout, Low Noise, Micropower Regulator With Independent Inputs
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Low Noise: 20µV
Low Quiescent Current: 25µA/Channel
Independent Inputs
Wide Input Voltage Range: 1.8V to 20V
Output Current: 100mA/Channel
Very Low Shutdown Current: <0.1
Low Dropout Voltage: 300mV at 100mA
Adjustable Output from 1.22V to 20V
Stable with 1µF Output Capacitor
Stable with Aluminum, Tantalum or
Ceramic Capacitors
Reverse Battery Protected
No Protection Diodes Needed
Overcurrent and Overtemperature Protected
Tracking/Sequencing Capability
Thermally Enhanced 10-Lead MSOP and DFN
Packages
Cellular Phones
Pagers
Battery-Powered Systems
Frequency Synthesizers
Wireless Modems
Tracking/Sequencing Power Supplies
3.7V TO
2.9V TO
V
V
20V
20V
IN1
IN2
1µF
1µF
3.3V/2.5V Low Noise Regulators
U
RMS
IN1
IN2
SHDN1
SHDN2
LT3027
GND
(10Hz to 100kHz)
OUT1
BYP1
OUT2
BYP2
ADJ1
ADJ2
0.01µF
0.01µF
U
µ
422k
249k
261k
249k
A
3.3V AT 100mA
20µV
10µF
2.5V AT 100mA
20µV
10µF
RMS
RMS
NOISE
NOISE
3027 TA01
Micropower Regulator with
DESCRIPTIO
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6118263, 6144250.
The LT
out regulator with independent inputs. With an external
0.01µF bypass capacitor, output noise is a low 20µV
over a 10Hz to 100kHz bandwidth. Designed for use in
battery-powered systems, the low 25µA quiescent current
per channel makes it an ideal choice. In shutdown, quies-
cent current drops to less than 0.1µA. Shutdown control
is independent for each channel, allowing for flexibility in
power management. The device is capable of operating
over an input voltage from 1.8V to 20V, and can supply
100mA of output current from each channel with a drop-
out voltage of 300mV. Quiescent current is well controlled
in dropout.
The LT3027 regulator is stable with output capacitors as
low as 1µF. Small ceramic capacitors can be used without
the series resistance required by other regulators.
Internal protection circuitry includes reverse battery pro-
tection, current limiting and thermal limiting protection.
The device is available as an adjustable device with a
1.22V reference voltage. The LT3027 regulator is available
in the thermally enhanced 10-lead MSOP and low profile
(0.75mm) 3mm × 3mm DFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Dropout, Low Noise,
®
3027 is a dual, micropower, low noise, low drop-
100µV/DIV
V
OUT
Independent Inputs
10Hz to 100kHz Output Noise
U
Dual 100mA,
3027 TA01b
20µV
RMS
LT3027
3027fa
RMS
1

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lt3027emse-trpbf Summary of contents

Page 1

... The LT3027 regulator is available in the thermally enhanced 10-lead MSOP and low profile (0.75mm) 3mm × 3mm DFN 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 6118263, 6144250. ...

Page 2

... T JMAX LBMC = 1mA LOAD < 20V, 1mA < I < 100mA IN LOAD = 1mA LOAD = 1mA to 100mA LOAD = 1mA to 100mA LOAD ORDER PART NUMBER TOP VIEW 10 OUT2 LT3027EMSE 9 IN2 11 LT3027IMSE 8 IN1 7 SHDN1 6 OUT1 MSE PART MSE PACKAGE MARKING LTBKK = 40°C/ W, θ = 10° LTBMD = 25°C. (Note 2) ...

Page 3

ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS GND Pin Current (Per Channel 0mA LOAD 1mA IN OUT(NOMINAL) LOAD (Notes 5, ...

Page 4

LT3027 W U TYPICAL PERFOR A CE CHARACTERISTICS Typical Dropout Voltage 500 450 400 350 T = 125°C J 300 250 T = 25°C J 200 150 100 100 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS SHDN1 or SHDN2 Pin Threshold (Off-to-On) 1.0 0 100mA 0.8 L 0.7 0 1mA L 0.5 0.4 0.3 0.2 0.1 0 – 100 125 –25 ...

Page 6

LT3027 W U TYPICAL PERFOR A CE CHARACTERISTICS Input Ripple Rejection OUT (NOMINAL 0.5V RIPPLE P 120Hz 50mA L 0 ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Output Noise vs Load Current (10Hz to 100kHz) 160 C = 10µF OUT C = 0µF BYP 140 C = 0.01µF BYP 120 V SET FOR 5V OUT 100 ...

Page 8

LT3027 CTIO S ADJ1/ADJ2 (Pins 4/2): Adjust Pin. These are the inputs to the error amplifiers. These pins are internally clamped to ±7V. They have a bias current of 30nA which flows into the pin ...

Page 9

U U APPLICATIO S I FOR ATIO The LT3027 is a dual 100mA low dropout regulator with independent inputs, micropower quiescent current and shutdown. The device is capable of supplying 100mA per channel at a dropout voltage of 300mV. Output ...

Page 10

LT3027 U U APPLICATIO S I FOR ATIO Output Capacitance and Transient Response The LT3027 regulator is designed to be stable with a wide range of output capacitors. The ESR of the output capaci- tor affects stability, most notably with ...

Page 11

U U APPLICATIO S I FOR ATIO Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the ...

Page 12

LT3027 U U APPLICATIONS INFORMATION The power dissipated by each channel of the device will be equal to – OUT(MAX) IN(MAX) OUT GND where (for the first channel 100mA OUT(MAX ...

Page 13

U TYPICAL APPLICATIO S Noise Bypassing Slows Startup, Allows Outputs to Track V IN1 3.7V TO 20V IN1 OUT1 1µF BYP1 ADJ1 V IN2 2.9V TO 20V IN2 LT3027 1µF OUT2 OFF ON SHDN1 BYP2 SHDN2 ADJ2 GND V IN ...

Page 14

LT3027 PACKAGE DESCRIPTIO 3.50 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # ...

Page 15

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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. ...

Page 16

... Stable with 1µF/3.3µF Ceramic Capacitors, RMS = 1.22 V, Dropout Voltage = 0.3V 60µ Stable with 1µF/3.3µF Ceramic Capacitors, RMS = 1.22 V, Dropout Voltage = 0.3V/0.32V, = <1µ Adj., TSSOP16, DFN Packages OUT RD/LT 1105 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 3027 TA03c = 30µA, Q 3027fa ...

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