LTC4221 datasheet(2/28 Pages) LINER

部件名	LTC4221

功能描述	Dual Hot Swap Controller/ Power Sequencer with Dual Speed, Dual Level Fault Protection

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LTC4221

4221f

ORDER PART

NUMBER

(Note 1)

Supply Voltage (VCCn) ............................................ 17V

SENSE

n Pins ............................ – 0.3V to (VCCn + 0.3V)

FB, ON Pins .............................. – 0.3V to (VCC1 + 0.3V)

TIMER Pin .................................................. – 0.3V to 2V

GATE Pins (Note 3) ................................... – 0.3V to 21V

PWRGD, FAULT, FILTER Pins ................... – 0.3V to 17V

Operating Temperature Range

LTC4221C ............................................... 0°C to 70°C

LTC4221I ............................................ – 40°C to 85°C

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

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

LTC4221CGN

LTC4221IGN

TJMAX = 125°C, θJA = 130°C/W

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC1

Supply Voltage Channel 1

●

2.7

13.5

V

VCC2

Supply Voltage Channel 2

VCC2 ≤ VCC1

●

1

13.5

V

ICC1

VCC1 Supply Current

ON1, ON2 = 2V

●

2.2

3

mA

ICC2

VCC2 Supply Current

ON1, ON2 = 2V

●

0.05

0.15

mA

VCC1(UVL)

Undervoltage Lockout for Channel 1

VCC1 Rising

●

2.1

2.5

2.675

V

∆VCC1(HYST)

Undervoltage Lockout Hysteresis

110

mV

VCC2(UVL)

Undervoltage Lockout for Channel 2

VCC2 Rising

●

0.65

0.8

0.975

V

∆VCC2(HYST)

Undervoltage Lockout Hysteresis

25

mV

ISENSE1(IN)

SENSE1 Pin Input Current

0V ≤ VSENSE1 ≤ VCC1

●

±0.03

±5

µA

ISENSE2(IN)

SENSE2 Pin Input Current

VSENSE2 = VCC2

●

±0.2

±5

µA

VSENSE2 = 0V

1000

µA

VSENSE(FC)

SENSE

n Threshold Voltage

Channel

n Fast Comparator Threshold

●

85

100

115

mV

VSENSE(SC)

SENSE

n Threshold Voltage

Channel

n Slow Comparator Threshold

22.5

25

27.5

mV

●

20.5

25

29.5

mV

VSENSE(ACL)

SENSE

n Voltage at Active

VFBn = 0

9

mV

Current Limit

VFBn = 0.65V

25

mV

IGATE(UP)

GATE

n Output Current

VON1 = VON2 = 2V, VGATEn = 0V

●

–7

–9.5

–12

µA

IGATE(DN)

GATE

n Output Current

VON1 = VON2 = 0.6V, VGATEn = 3.3V

●

75

100

125

µA

IGATE(FSTDN)

GATE

n Output Current

UVLO with VGATEn = 3.3V or FAULT

16

mA

Latched with VGATEn = 3.3V

∆VGATE

External N-Channel Gate Drive

VGATEn – VCC1 for VCC1 = 2.7V, VCC2 = 1V

●

4.5

13

V

VGATEn – VCC1 for VCC1 = 3.3V, VCC2 = 2.5V

●

516

V

VGATEn – VCC1 for VCC1 = 5V, VCC2 = 3.3V

●

816

V

VGATEn – VCC1 for VCC1 = 12V, VCC2 = 12V

●

718

V

VGATE(OV)

GATE

n Overvoltage Lockout Threshold

●

0.4

0.5

V

ION(IN)

ON

n Pin Input Current

0V ≤ VONn ≤ VCC1

●

±0.01

±1

µA

VON(RESET)

ON1 Reset Threshold

VON1 Falling

●

0.375

0.4

0.425

V

∆VON(RESETHYST)

ON1 Reset Threshold Hysteresis

25

mV

The

● indicates specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC1 = 5V, VCC2 = 3.3V, unless otherwise noted.

GN PACKAGE

16-LEAD PLASTIC SSOP

1

2

3

4

5

6

7

8

TOP VIEW

16

15

14

13

12

11

10

9

ON1

VCC1

SENSE1

GATE1

FB1

PWRGD1

FAULT

FILTER

ON2

VCC2

SENSE2

GATE2

FB2

PWRGD2

GND

TIMER

GN PART

MARKING

4221

4221I

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

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