LT3667IUDD View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3667IUDD

Iq= 50uA at 12Vin to 5V, 3.3V and 2.5V with No Load / 40V 400mA Step-Down Switching Regulator with Dual Fault Protected LDOs

Linear Technology 

LT3667

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.

LDOs:

RMS Output Noise

400

COUT = 10µF

350 fOUT = 10Hz TO 100kHz

VOUT2/3 = 5V

300

250

VOUT2/3 = 3.3V

200

VOUT2/3 = 2.5V

150

VOUT2/3 = 1.8V

100

50

0

0.01

VOUT2/3 = 1.2V

VOUT2/3 = 0.8V

VOUT2/3 = 1.5V

0.1

1

10

100

LOAD CURRENT (mA)

3667 G37

LDOs:

Channel-to-Channel Isolation

IOUT2/3 = 20mA TO 200mA

VOUT2/3

50mV/DIV

LDOs:

Transient Response

VOUT2/3

100mV/DIV

VOUT3/2

50mV/DIV

IOUT3/2 = 20mA

200µs/DIV

VIN2/3 = 6V, VOUT2/3 = 5V

CIN2/3 = COUT2/3 = 10µF

IOUT2/3

100mV/DIV

3667 G38

IOUT2/3 = 20mA TO 200mA

VIN2/3 = 6V, VOUT2/3 = 5V

CIN2/3 = COUT2/3 = 10µF

100µs/DIV

3667 G39

LDOs: External Current Limit,

REN/ILIM = 1.54k

210

VOUT2/3 = 5V

205

VIN2/3 = 5.6V

200

VIN2/3 = 10V

195

190

VIN2/3 = 15V

185

180

175

170

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

3667 G40

LDOs: External Current Limit,

REN/ILIM = 6.19k

52.0

VOUT2/3 = 5V

51.5

VIN2/3 = 5.6V

51.0

VIN2/3 = 10V

50.5

50.0

VIN2/3 = 15V

49.5

49.0

48.5

48.0

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

3667 G41

LDOs: External Current Limit,

REN/ILIM = 31.6k

10.2

VOUT2/3 = 5V

10.1

VIN2/3 = 5.6V

10.0

VIN2/3 = 10V

VIN2/3 = 15V

9.9

9.8

–50 –25 0 25 50 75 100 125 150

TEMPERATURE (°C)

3667 G42

10

For more information www.linear.com/LT3667

3667fb

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