LTC1148-3.3_15 datasheet(2/20 Pages) LINER

Part #	LTC1148-3.3

Description	High Efficiency Synchronous Step-Down Switching Regulators

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Manufacturer	LINER [Linear Technology]

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2

LTC1148

LTC1148-3.3/LTC1148-5

114835fd

A

G

A

U

A

R

BSOLUTEXI

TI

S

ORDER PART

NUMBER

LTC1148CN

LTC1148HVCN

LTC1148CN-3.3

LTC1148HVCN-3.3

LTC1148CN-5

LTC1148HVCN-5

LTC1148CS

LTC1148HVCS

LTC1148LCS

LTC1148CS-3.3

LTC1148HVCS-3.3

LTC1148LCS-3.3

LTC1148CS-5

LTC1148HVCS-5

LTC1148HVIS-5

PACKAGE/ORDER I FOR ATIO

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V9

Feedback Voltage (LTC1148, LTC1148L,

VIN = 9V

●

1.21

1.25

1.29

V

LTC1148HV)

I9

Feedback Current (LTC1148, LTC1148L,

●

0.2

1

µA

LTC1148HV)

VOUT

Regulated Output Voltage

VIN = 9V

LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 ILOAD = 700mA

●

3.23

3.33

3.43

V

LTC1148-5, LTC1148HV-5

ILOAD = 700mA

●

4.90

5.05

5.20

V

∆VOUT

Output Voltage Line Regulation

VIN = 7V to 12V, ILOAD = 50mA

– 40

0

40

mV

Output Voltage Load Regulation

LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 5mA < ILOAD < 2A

●

40

65

mV

LTC1148-5, LTC1148HV-5

5mA < ILOAD < 2A

●

60

100

mV

Output Ripple (Burst Mode)

ILOAD = 0A

50

mVP-P

IQ

Input DC Supply Current (Note 3)

(Note 7)

LTC1148 Series

Normal Mode

4V < VIN < 12V

1.6

2.1

mA

Sleep Mode

4V < VIN < 12V

160

230

µA

Sleep Mode (LTC1148-5)

6V < VIN < 12V

160

230

µA

Shutdown

VSHUTDOWN = 2.1V, 4V < VIN < 12V

10

20

µA

LTC1148HV Series

Normal Mode

4V < VIN < 18V

1.6

2.3

mA

Sleep Mode

4V < VIN < 18V

160

250

µA

Sleep Mode (LTC1148HV-5)

6V < VIN < 18V

160

250

µA

Shutdown

VSHUTDOWN = 2.1V, 4V < VIN < 18V

10

22

µA

LTC1148L Series

Normal Mode

3.5V < VIN < 12V

1.6

2.1

mA

Sleep Mode

3.5V < VIN < 12V

160

230

µA

Shutdown

VSHUTDOWN = 2.1V, 3.5V < VIN < 12V

10

20

µA

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHUTDOWN = 0V unless otherwise noted.

ELECTRICAL C

C

HARA TERISTICS

1

2

3

4

5

6

7

TOP VIEW

S PACKAGE

14-LEAD PLASTIC SO

N PACKAGE

14-LEAD PDIP

14

13

12

11

10

9

8

P-DRIVE

NC

VIN

CT

INTVCC

ITH

SENSE–

N-DRIVE

NC

PGND

SGND

SHUTDOWN

VFB*

SENSE+

*FIXED OUTPUT VERSIONS = NC

TJMAX = 125°C, θJA = 70°C/ W (N)

TJMAX = 125°C, θJA = 110°C/ W (S)

(Note 1)

Input Supply Voltage (Pin 3)

LTC1148 and LTC1148L Series ............ 16V to – 0.3V

LTC1148HV Series ............................... 20V to – 0.3V

Continuous Output Current (Pins 1, 14) .............. 50mA

Sense Voltages (Pins 7, 8)

LTC1148HV (Adjustable Only)

VIN ≥ 12.7V ...................................... 13V to – 0.3V

VIN < 12.7V ......................... (VIN + 0.3V) to – 0.3V

Operating Ambient Temperature Range ...... 0°C to 70°C

Extended Commercial and Industrial

Temperature Range ............................... – 40°C to 85°C

Junction Temperature (Note 2) ............................ 125°C

Storage Temperature Range ................ – 65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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