Rainbow-electronics MAX781 Manual do Utilizador descarregar pdf (Página 2)

MAX781

PDA/Hand-Held Computer Power Controller

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(BATT = 6V, power-on reset state, T

= T

MIN

to T

MAX

, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

BATT, VCHG, VHI to AGND.........................................-0.3V, 20V

VPPA, VPPB to AGND..................................................-0.3V, 20V

FAST, GD1, GD2, GD3, GD4, GD5 to AGND..............-0.3V, 20V

BST to AGND...............................................................-0.3V, 30V

BST to LX.......................................................................-0.3V, 7V

DHI to LX.......................................................-0.3V, (BST + 0.3V)

PGND to AGND........................................................-0.3V, +0.3V

All Other Pins to AGND or PGND ..................................-0.3V, 7V

VPPA, VPPB Current.........................................................100mA

5OUT Current....................................................................100mA

3OUT Current......................................................................40mA

Continuous Power Dissipation (T

= +70°C)

SSOP (derate 11.76mW/°C above +70°C) ....................941mW

Operating Temperature Ranges

MAX781CBX .........................................................0°C to +70°C

MAX781EBX......................................................-40°C to +85°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

Low-power mode,

–

—

–

= BATT = 18V

Shutdown mode,

–

—

–

= 0V

SYNC = AGND or 5OUT

SYNC = REF

Low-power mode, 5.5V < BATT < 18V,

0mA < I

5OUT

< 10mA

Operate or standby mode, 5.5V < BATT < 18V,

0mA < I

5OUT

< 25mA

Standby mode,

–

—

–

= BATT = 18V

Operate mode,

–

—

–

= BATT = 18V

No load

5OUT

falling

SOURCE

= -20µA to 100µA

5OUT

rising

CONDITIONS

nA-100 100SYNC Leakage Current

V3.8SYNC Input Voltage High

V0.75SYNC Input Voltage Low

µs1SYNC Rise Time (Note 1)

ns200SYNC Fall Time (Note 1)

ns500SYNC Minimum Pulse Width (Note1)

kHz270 350SYNC Capture Range (Note 1)

kHz

170 230 260

Internal Oscillator Frequency

270 300 340

nA50UVLO Input Bias Current

4.10 4.35 4.50

Internal Undervoltage Lockout

Threshold (measured at 5OUT,

UVLO = AGND)

4.30 4.60 4.80

60 120

4.8 5.2

5OUT Output Voltage

4.8 5.2

µA

250 750

mA12

BATT Quiescent Supply Current

V2.463 2.5 2.537REF Output Voltage

mV-20 20REF Load Regulation

UNITSMIN TYP MAXPARAMETER

UVLO

falling

UVLO

rising

%REF

90 96

UVLO Threshold

(measured at UVLO)

97 103

SUPPLY AND REFERENCE

INTERNAL OSCILLATOR

1 2 3 4 5 6 7 ... 23 24

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