MAX4959 데이터 시트보기 (PDF) - Maxim Integrated

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MAX4959

High-Voltage OVP with Battery Switchover

Maxim Integrated 

High-Voltage OVP with Battery Switchover

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +19V, TA = -40°C to +85°C, unless otherwise noted, CVDD = 100nF. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

GATE1 Leakage Current

G1ILKG VOVS > OVREF, VUVS < UVREF, or VCB = +5V

-1

+1

GATE2 Leakage Current

G2ILKG VCB = 0V

-1

+1

CB

Logic-Level High

Logic-Level Low

CB Pulldown Resistor

TIMING

VIH

VIL

RCBPD

1.5

0.4

1

2

3

Debounce Time

tDEB

VOVP > VIN > VUVP for greater than tDEB for

GATE1 to go low

10

25

40

UNITS

µA

µA

V

V

MΩ

ms

GATE1 Assertion Delay from

CB Pin

t1GATE

CB = +3V to 0

rise time = fall time = 5ns (Note 3)

50

ns

GATE2 Assertion Delay from

CB Pin

Blanking Time

MAX4960

SOURCE1/GATE1 Resistance

GATE1/Ground Resistance

t2GATE

tBLANK

CB = 0 to +3V

rise time = fall time = 5ns (Note 3)

RSG

RGG

(MAX4960)

GATE1 Asserted (MAX4960)

50

ns

10

25

40

ms

140

200

260

kΩ

140

200

260

kΩ

Note 1: Operation is tested at TA= +25°C and guaranteed by design for µDFN package. Operation over specified temperature range

is tested for µMAX package.

Note 2: Do not exceed absolute maximum rating; the ratio between the externally set OVLO and UVLO threshold must not exceed 4,

[OVLO/UVLO]MAX ≤ 4.

Note 3: Assertion delay starts from switching of CB pin to reaching of 80% of GATE1/GATE2 transition. This delay is measured without

external capacitive load.

Typical Operating Characteristics

(VOVLO = 22.2V and VUVLO = 10.1V, R1 = 887kΩ, R2 = 66.5kΩ, R3 = 54.9kΩ, all resistors 1%, OVREF = UVREF = 1.228V.)

POWER-UP RESPONSE

(RPULLUP = 1kΩ)

12

10

VIN

VGATE1

8

6

4

VDD

2

0

-2

-150 -100

-50 0 50

TIME (μs)

100 150

OVERVOLTAGE RESPONSE

(RPULLUP = 5kΩ)

30

VIN

25

20

15

VGATE1

10

VDD

5

0

-150 -100

-50 0 50

TIME (μs)

100 150

UNDERVOLTAGE RESPONSE

(WITHIN BLANKING TIME)

(RPULLUP = 1kΩ)

16

DRAIN OF P1

14

12

VIN

10

8

6

4 VGATE1

2

0

0 10 20 30 40 50 60 70

TIME (μs)

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