LTC4216CMS View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC4216CMS

Ultralow Voltage Hot Swap Controller

Linear Technology 

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LTC4216

Applications Information

FILTER RAMPS UP WHEN (VSENSEP – VSENSEN) > 25mV

CHECK FOR GATE, FILTER, TIMER, SS < 0.2V AND FAULT HIGH

ELECTRONIC CIRCUIT BREAKER ARMED

CHECK FOR GATE,

FILTER, TIMER,

SS < 0.2V

OUTPUT IN ANALOG CURRENT LIMIT,

(VSENSEP – VSENSEN) = 40mV

2ND TIMING CYCLE CANNOT START WITH

OUTPUT IN ANALOG CURRENT LIMIT

OUTPUT NO LONGER RESET ON GOES LOW

IN CURRENT LIMIT GOES HIGH (ON < 0.72V)

RESET PULLED LOW

DUE TO POWER BAD

IN RESET

MODE

(ON < 0.4V)

12

34

5 6 7 8 9 10 11

12

13 14 15 16

VCC

SENSEP

ON

TIMER

SS

GATE

VOUT

ILOAD

FILTER

RESET

0.8V

VTMR(TH)

2µA

VTMR(TH)

2µA

10µA

10µA

1µA

IN REGULATION

TRACKS SS RAMP

(VGATE – VOUT) > VGS(TH)

20µA

POWER GOOD

VFB > 0.6V

LOAD CURRENT REGULATING

AT 40mV/RSENSE

(VSENSEP – VSENSEN) > 25mV

(VSENSEP – VSENSEN) < 25mV

VFILT(TH)

60µA

2.4µA

0.72V

0.4V

POWER BAD

VFB < 0.6V

PLUG-IN CYCLE

FIRST TIMING CYCLE

POWER-GOOD DELAY

SECOND TIMING CYCLE

4216 F09

Figure 9. Normal Power-Up Sequence (with Analog Current Limiting)

4216fa

16

For more information www.linear.com/LTC4216

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