PM6685 查看數據表（PDF） - STMicroelectronics

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PM6685

Dual step-down main supply controller with auxilary voltages for notebook system power

STMicroelectronics 

PM6685

Electrical characteristics

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min Typ Max Unit

Current limit and zero crossing comparator

ICSENSE

Input bias current limit

Comparator offset

VCSENSE-VPGND

Zero crossing comparator offset VPGND-VPHASE

Fixed negative current limit

threshold

VPGND-VPHASE

90

100

110

µA

-6

6

mV

-1

11

mV

-120

mV

On time pulse width

Ton

ON-time duration

OUT5=5V

FSEL to GND

OUT3=3.3V

1685

780

1985

920

2285

1060

FSEL to

VREF

OUT5=5V

1115 1315 1515

ns

OUT3=3.3V

585

690

795

FSEL to

LDO5

OUT5=5V

830 980 1130

OUT3=3.3V

470

555

640

OFF time

TOFFMIN Minimum off time

Voltage reference

400

500

ns

VREF

Voltage accuracy

Load regulation

Undervoltage lockout fault

threshold

4.2V<VLDO5< 5.5V

-100µA< IREF < 100µA

Falling edge of REF

1.224 1.237 1.249

V

-4

4

mV

0.95

V

Integrator

COMP

Over voltage clamp

Under voltage clamp

Normal mode

Pulse skip mode

250

60

mV

-150

Line regulation

Both SMPS, 6V<Vin<28V(1)

0.004

%/V

LDO5 linear regulator

VLDO5

LDO5 linear output voltage

LDO5 line regulation

6V<VIN<28V, 0<ILDO5<50mA

4.9

6V< VIN < 28V, ILDO5 =50mA ,

LDO3_SEL tied to GND

5.0

5.1

V

0.004 %/V

ILDO5

UVLO

LDO5 current limit

Under voltage lockout of LDO5

VLDO5 > UVLO, ILDO3=0A

VOUT5>5.1V, VOUT3>3.34V

270

350

400

mA

3.94

4

4.13

V

11/52

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