MB3800 datasheet(6/21 Pages) CYPRESS

Part #	MB3800

Description	Wide supply voltage operating range: 1.8 V to 15 V

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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6 / 21 page

MB3800

Document Number: 002-08716 Rev. *A

Page 6 of 21

6. Electrical Characteristics

(VCC = +2 V, Ta = +25°C)

(Continued)

Parameter

Symbol

Condition

Value

Unit

Min

Typ

Max

Circuit to prevent

malfunction at low input

voltage (U.V.L.O.)

Reset voltage

VR

—

——0.9

V

Threshold voltage

VTH

1.11.3

1.5V

Soft start

Charging current

ICS

VSCP = 0 V

–1.5

–1.0

–0.7

A

Voltage at soft start

completion

VtS

—0.7

0.8

0.9

V

Short circuit detection

(S.C.P.)

Charging current

ICPC

VSCP = 0 V

–1.5

–1.0

–0.7

A

Threshold voltage

VtPC

—0.7

0.8

0.9

V

Sawtooth wave oscil-

lator (OSC)

Oscillation frequency

fOCS

RT = 3.0 k, CT = 270 pF

400

500

600

kHz

Frequency input stability

fdV

VCC = 2 V to 15 V

—

2

10

%

Frequency variation with

temperature

fdT

Ta = –30°C to +85°C

—

5

—

%

Error amplifier

Input threshold voltage

VT

VFB = 450 mV

480

500

520

mV

VT input stability

VTdV

VCC = 2 V to 15 V

—

5

20

mV

VT variation with temper-

ature

VTdT

Ta = –30°C to +85°C

—

1

—

%

Input bias current

IB

VIN = 0 V

–1.0

–0.2

+1.0

A

Voltage gain

AV

—

70

100

145

V/V

Frequency bandwidth

BW

AV = 0 dB

—

6

—

MHz

Maximum output voltage

range

VOM+

—0.78

0.87

—

V

VOM–

—

0.05

0.2

V

Output source current

IOM+

VFB = 0.45 V

—

–40

–24

A

Output sink current

IOM–

24

40

—

A

Idle period adjustment

section

Maximum duty cycle

tDUTY

RT = 3.0 k, CT = 270 pF

VFB = 0.8 V

65

75

85

%

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