LTC2923CMS datasheet(2/20 Pages) LINER

Part #	LTC2923CMS

Description	Power Supply Tracking Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC2923

2

2923fa

Supply Voltage (VCC) ................................ –0.3V to 10V

Input Voltages

ON ........................................................ – 0.3V to 10V

TRACK1, TRACK2 ...................... – 0.3V to VCC + 0.3V

RAMP ........................................... – 0.3V to VCC + 1V

Output Voltages

FB1, FB2, SDO, STATUS ........................ – 0.3V to 10V

RAMPBUF ................................. – 0.3V to VCC + 0.3V

GATE (Note 2) ................................... – 0.3V to 11.5V

(Note 1)

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

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

MS PART

MARKING

LTAED

LTAEE

ORDER PART

NUMBER

TJMAX = 125°C, θJA = 120°C/W

1

2

3

4

5

VCC

ON

TRACK1

TRACK2

RAMPBUF

10

9

8

7

6

RAMP

GATE

FB1

FB2

GND

TOP VIEW

MS PACKAGE

10-LEAD PLASTIC MSOP

Average Current

TRACK1, TRACK2 .............................................. 5mA

FB1, FB2 ............................................................ 5mA

RAMPBUF ......................................................... 5mA

Operating Temperature Range

LTC2923C ............................................... 0°C to 70°C

LTC2923I ............................................ – 40°C to 85°C

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

Lead Temperature (Soldering, 10 sec)

MS Package .................................................... 300°C

DE PART

MARKING

2923

ORDER PART

NUMBER

LTC2923CDE

LTC2923IDE

12

11

10

9

8

7

1

2

3

4

5

6

RAMP

GATE

STATUS

SDO

FB1

FB2

VCC

ON

TRACK1

TRACK2

RAMPBUF

GND

TOP VIEW

13

DE12 PACKAGE

12-LEAD (4mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 43°C/W

EXPOSED PAD (PIN 13) INTERNALLY CONNECTED TO GND

(PCB CONNECTION OPTIONAL)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Input Supply Range

●

2.9

5.5

V

ICC

Input Supply Current

IFBx = 0, ITRACKx = 0

●

1.3

3

mA

IFBx = –1mA, ITRACKx = –1mA,

●

57

10

mA

IRAMPBUF = –2mA

VCC(UVL)

Input Supply Undervoltage Lockout

VCC Rising

●

2.2

2.5

2.7

V

∆VCC(UVLHYST) Input Supply Undervoltage Lockout Hysteresis

25

mV

∆VGATE

External N-Channel Gate Drive (VGATE – VCC)IGATE = –1µA

●

5

5.5

6

V

IGATE

GATE Pin Current

Gate On, VGATE = 0V, No Faults

●

–7

–10

–13

µA

Gate Off, VGATE = 5V, No Faults

●

7

10

13

µA

Gate Off, VGATE = 5V,

●

5

20

50

mA

Short-Circuit Fault

VON(TH)

ON Pin Threshold Voltage

VON Rising

●

1.212

1.230

1.248

V

∆VON(HYST)

ON Pin Hysteresis

●

30

75

150

mV

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. 2.9V < VCC < 5.5V unless otherwise noted (Note 3).

ELECTRICAL CHARACTERISTICS

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