PM6680ATR datasheet(10/48 Pages) STMICROELECTRONICS

10 / 48 page

Electrical characteristics

PM6680A

10/48

Table 5.

Electrical characteristics (continued)

(TA = -40 °C to 125 °C, unless otherwise specified. All parameters at operating temperature

extremes are guaranteed by design and statistical analysis (not production tested).

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Minimum on time

On time pulse width@Vin = 24 V

FSEL to GND

OUT1=3.3 V

595

700

805

OUT2=1.8 V

190

225

260

FSEL to VREF

OUT1=3.3 V

400

470

545

OUT2=1.8 V

145

170

200

FSEL to LDO5

OUT1=3.3 V

300

355

410

OUT2=1.8 V

105

125

145

Minimum off time

TOFFMIN @ Vin = 24 V

350

500

Voltage reference

VREF

Voltage accuracy

4V < VLDO5 < 5.5 V

1.224

1.236

1.249

Load regulation

-100 µA < IREF < 100 µA

-4

Undervoltage lockout fault

threshold

Falling edge of REF

0.95

PWM comparator

Voltage accuracy

-909

900

909

Input bias current

0.1

µA

COMP

Over voltage clamp

Normal mode

250

Pulse skip mode

COMP

Under voltage clamp

-150

Line regulation

Both SMPS, 6V < VIN < 36V

(2)

LDO5 linear regulation

VLDO5

LDO5 linear output voltage

6 V < VIN < 36 V,

0 < ILDO5 < 50 mA

4.9

5.0

5.1

LDO5 line regulation

6 V < VIN < 36 V,

ILDO5 = 20 mA ,

0.004

%/V

ILDO5

LDO5 current limit

VLDO5 > UVLO

270

330

400

ULVO

Under voltage lockout of

LDO5

3.94

4.13

2. By demoboard test

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