ADC 2 Especificações descarregar pdf (Página 3)

LTC4261/LTC4261-2

42612fd

For more information www.linear.com/LTC4261

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at I

= 5mA, T

= 25°C. (Note 2)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

General

Shunt Regulator Voltage at V

= 5mA

10.65 11.2 11.8 V

Shunt Regulator Load Regulation I

= 5mA to 25mA

370 600 mV

Supply Current V

= V

– 0.3V

2 5 mA

IN(UVLO)

Undervoltage Lockout Threshold V

Rising

8.5 9 9.5 V

IN(UVLO)

Undervoltage Lockout Hysteresis

0.3 0.7 1 V

INTV

Internal Regulator Voltage I

LOAD

= 1mA to 20mA, I

= 25mA

4.75 5 5.25 V

Gate Drive

GATEH

GATE Pin Output High Voltage V

= 10.65V

10 10.25 10.5 V

GATE(UP)

GATE Pin Pull-Up Current V

GATE

= 4V

–7.5 –11.5 –15.5 µA

GATE(OFF)

GATE Turn-Off Current V

SENSE

= 400mV, V

GATE

= 4V

45 90 120 mA

Gate Off, V

GATE

= 4V

60 110 140 mA

PHL(SENSE)

SENSE High to Current Limit V

SENSE

= 100mV, GATE Open

0.5 1.5 µs

Propagation Delay

SENSE

= 300mV, GATE Open

0.2 0.5 µs

PHL(GATE)

GATE Off Propagation Delay Input High (OV, EN, PGI), Input Low (ON, UVL),

GATE Open

0.2 0.5 µs

PHLCB

Circuit Breaker Gate Off Delay V

GATE

< 2V, GATE Open

440 530 620 µs

RAMP

RAMP Pin Current V

= 2.56V

–18 –20 –22 µA

SS Pin Clamp Voltage

2.43 2.56 2.69 V

SS(UP)

SS Pin Pull-Up Current V

= 0V

–7 –10 –13 µA

SS(DN)

SS Pin Pull-Down Current V

= 2.56V

6 12 20 mA

Input Pins

UVH(TH)

UVH Threshold Voltage V

UVH

Rising LTC4261C

LTC4261I

2.534

2.522

2.56

2.586

2.598

UVL(TH)

UVL Threshold Voltage V

UVL

Falling LTC4261C

LTC4261I

2.263

2.254

2.291

2.319

2.328

UV(HYST)

Built-In UV Hysteresis UVH and UVL Tied Together

256 269 282 mV

UVH, UVL Minimum Hysteresis 15 mV

UVLR(TH)

UVL Reset Threshold Voltage V

UVL

Falling

1.12 1.21 1.30 V

UVLR(HYST)

UVL Reset Hysteresis 60 mV

OV(TH)

OV Pin Threshold Voltage V

Rising LTC4261C

LTC4261I

1.744

1.735

1.770

1.796

1.805

OV(HYST)

OV Pin Hysteresis

18 37.5 62 mV

SENSE

Current Limit Sense Voltage Threshold V

SENSE

– V

45 50 55 mV

INPUT(TH)

ON, EN, PGI, FLTIN Threshold Voltage ON, EN, PGI, FLTIN Falling or Rising

0.8 1.4 2 V

INPUT(HYST)

ON, EN, PGI, FLTIN Hysteresis 170 mV

PGIO(TH)

PGIO Pin Input Threshold Voltage V

PGIO

Rising

1.10 1.25 1.40 V

PGIO(HYST)

PGIO Pin Input Hysteresis 100 mV

INPUT

ON, EN, UVH, UVL, OV, SENSE, PGI,

FLTIN Input Current

ON, EN, UVH, UVL, OV, SENSE, PGI, FLTIN = 3V

0 ±2 µA

ELECTRICAL CHARACTERISTICS

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