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Linear Technology Electronic Components Datasheet

LT3090IMSE Datasheet

600mA Negative Linear Regulator

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LT3090
Features
–36V, 600mA Negative
Linear Regulator with
Programmable Current Limit
Description
n Output Current: 600mA
n Single Resistor Sets Output Voltage
n 50µA SET Pin Current: ±1% Initial Accuracy
n Programmable Current Limit
n Positive or Negative Output Current Monitor
n Parallelable for Higher Current and Heat Spreading
n Low Dropout Voltage: 300mV
n Low Output Noise: 18µVRMS (10Hz to 100kHz)
n Configurable as 3-Terminal Floating Regulator
n Wide Input Voltage Range: –1.5V to –36V
n Rail-to-Rail Output Voltage Range: 0V to –32V
n Positive/Negative Shutdown Logic or UVLO
n Programmable Cable Drop Compensation
n Load Regulation: 1.2mV (1mA to 600mA)
n Stable with 4.7µF Minimum Output Capacitor
n Stable with Ceramic or Tantalum Capacitors
n Thermally Enhanced 12-Lead MSOP and 10-Lead
0.75mm × 3mm × 3mm DFN Packages
Applications
n Post Regulator for Switching Supplies
n Low Noise Instrumentation and RF Supplies
n Rugged Industrial Supplies
n Precision Power Supplies
The LT®3090 is a 600mA, low dropout negative linear
regulator that is easily parallelable to increase output
current or spread heat on surface mounted boards.
Designed with a precision current reference followed by a
high performance rail-to-rail voltage buffer, this regulator
finds use in applications requiring precision output, high
current with no heat sink, output adjustability to zero and
low dropout voltage. The device can also be configured
as a 3-terminal floating regulator.
The LT3090 features fast transient response, high PSRR
and output noise as low as 18µVRMS. The LT3090 generates
a wide output voltage range (0V to –32V) while maintain-
ing unity gain operation. This yields virtually constant
bandwidth, load regulation, PSRR and noise, regardless
of the programmed output voltage.
The LT3090 supplies 600mA at a typical dropout voltage
of 300mV. Operating quiescent current is nominally 1mA
and drops to << 1µA in shutdown. A single resistor ad-
justs the LT3090’s precision programmable current limit.
The LT3090’s positive or negative current monitor either
sources a current (0.5mA/A) or sinks a current (1mA/A)
proportional to output current. Built-in protection includes
reverse output protection, internal current limit with fold-
back and thermal shutdown with hysteresis.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Patent Pending.
Typical Application
0.1µF 49.9k
LT3090
SET
GND
+
VIN
–3V TO –10V
4.7µF
IN
50µA
SHDN
ILIM
10k
TO ADC (IMON)
3.32k
IMONP OUT
4.7µF
VOUT
–2.5V
MAX IOUT
600mA
IMONN
3.3V
0.1µF
3090 TA01a
Output Noise: 10Hz to 100kHz
VOUT
100µV/DIV
1ms/DIV
VIN: –3.5V
VOUT: –2V
COUT: 4.7µF, CSET: 0.1µF
IL: 600mA
3090 TA01b
For more information www.linear.com/LT3090
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Linear Technology Electronic Components Datasheet

LT3090IMSE Datasheet

600mA Negative Linear Regulator

No Preview Available !

LT3090
Absolute Maximum Ratings
(Note 1)
IN Pin Voltage (Note 3)
with Respect to GND Pin............................0.3V, –40V
ILIM Pin Voltage
with Respect to IN Pin (Note 3).................–0.3V, 0.7V
IMONP Pin Voltage
with Respect to IN Pin (Note 3)..................–0.3V, 40V
with Respect to GND Pin.............................–40V, 20V
with Respect to IMONN Pin.........................–40V, 20V
IMONN Pin Voltage
with Respect to IN Pin (Note 3)..................–0.3V, 40V
with Respect to GND Pin.............................–40V, 20V
SHDN Pin Voltage
with Respect to IN Pin (Note 3)..................–0.3V, 55V
with Respect to GND Pin.............................–40V, 20V
SET Pin Voltage
with Respect to IN Pin (Note 3)..................–0.3V, 36V
with Respect to GND Pin.....................................±36V
SET Pin Current (Note 9)........................................±5mA
OUT Pin Voltage
with Respect to IN Pin (Note 3)..................–0.3V, 36V
with Respect to GND Pin.....................................±36V
Output Short-Circuit Duration........................... Indefinite
Operating Junction Temperature Range (Note 2)
E-, I-Grade......................................... –40°C to 125°C
MP-Grade.......................................... –55°C to 150°C
H-Grade............................................. –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 Sec)
MSE Package .................................................... 300°C
Pin Configuration
TOP VIEW
IN 1
IN 2
ILIM 3
IMONP 4
IMONN 5
10 OUT
9 OUT
11
IN
8 GND
7 SET
6 SHDN
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 34°C/W, θJC = 5.5°C/W
EXPOSED PAD (PIN 11) IS IN, MUST BE SOLDERED TO PCB
TOP VIEW
IN 1
12 OUT
IN 2
11 OUT
IN 3
13
10 OUT
ILIM 4
IN
9 GND
IMONP 5
8 SET
IMONN 6
7 SHDN
MSE PACKAGE
12-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 33°C/W, θJC = 8°C/W
EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3090EDD#PBF
LT3090EDD#TRPBF
LGHJ
10-Lead (3mm x 3mm) Plastic DFN
–40°C to 125°C
LT3090IDD#PBF
LT3090IDD#TRPBF
LGHJ
10-Lead (3mm x 3mm) Plastic DFN
–40°C to 125°C
LT3090HDD#PBF
LT3090HDD#TRPBF
LGHJ
10-Lead (3mm x 3mm) Plastic DFN
–40°C to 150°C
LT3090MPDD#PBF
LT3090MPDD#TRPBF LGHJ
10-Lead (3mm x 3mm) Plastic DFN
–55°C to 150°C
LT3090EMSE#PBF
LT3090EMSE#TRPBF 3090
12-Lead Plastic MSOP
–40°C to 125°C
LT3090IMSE#PBF
LT3090IMSE#TRPBF
3090
12-Lead Plastic MSOP
–40°C to 125°C
LT3090HMSE#PBF
LT3090HMSE#TRPBF 3090
12-Lead Plastic MSOP
–40°C to 150°C
LT3090MPMSE#PBF
LT3090MPMSE#TRPBF 3090
12-Lead Plastic MSOP
–55°C to 150°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/
3090fa
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For more information www.linear.com/LT3090


Part Number LT3090IMSE
Description 600mA Negative Linear Regulator
Maker Linear
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