LTC4216CMS View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC4216CMS

Ultralow Voltage Hot Swap Controller

Linear Technology 

LTC4216

Applications Information

capacitors. A second timing cycle starts at time point 11

when the FB pin voltage exceeds 0.6V and the voltage

across the sense resistor drops below 25mV.RESET goes

high at the end of the second timing cycle (time point 12)

when TIMER reaches the VTMR(TH) threshold.

ELECTRONIC CIRCUIT

BREAKER ARMED

CHECK FOR GATE,

FILTER, TIMER,

SS < 0.2V

CHECK FOR GATE, FILTER,

TIMER, SS < 0.2V AND FAULT HIGH

START

GATE

RAMP

START 2ND TIMING CYCLE

(CHECK TIMER < 0.2V AND

FAULT HIGH)

ON GOES LOW

RESET GOES HIGH

RESET PULLED LOW

DUE TO POWER BAD

IN

RESET

MODE

12

3 4 56

78

9

10 11 12

13

VCC

SENSEP

ON

TIMER

SS

GATE

VOUT

RESET

0.8V

VTMR(TH)

2µA

10µA

10µA

1µA

TRACKS SS RAMP

(VGATE – VOUT) > VGS(TH)

20µA

VTMR(TH)

2µA

POWER GOOD

VFB > 0.6V

0.72V

0.4V

POWER BAD

VFB < 0.6V

PLUG-IN CYCLE

FIRST TIMING CYCLE

POWER-GOOD DELAY

SECOND TIMING CYCLE

4216 F08

Figure 8. Normal Power-Up/Power-Down Sequence

For more information www.linear.com/LTC4216

4216fa

15

Share Link: