AS1337 datasheet(4/14 Pages) AMSCO

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AS1337

Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s

6 Electrical Characteristics

VIN = VEN = +1.2V, VOUT = +3.3V, Typ values @ TAMB = +25ºC, TAMB = -40 to +85ºC (unless otherwise specified);

Table 3. Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Input

Minimum Start-Up Voltage

ILOAD = 1mA

0.85

1.15

Minimum Operating Voltage

EN = VIN

1. Minimum VIN operation after start-up is only limited by the battery’s ability to provide the necessary power as it

enters a deeply discharged state.

0.65

0.85

VIN

Maximum Input Voltage

4.5

Output Voltage Adjust Range

2.5

Regulation

VFB

Feedback Voltage

1.192

1.23

1.268

IFB

Feedback Input Current

VFB = 1.25V

Operating Current

IQPWS

Quiescent Current

VFB = 1.4V

2. IQPWS is measured at VOUT. Multiply this value by VOUT/VIN to get the equivalent input (battery) current.

µA

ISHDN

Shutdown Current

EN = GND, VIN = 3.3V

0.01

µA

Switches

INMOSSWL NMOS Switch Leakage

0.01

µA

RONNMOS NMOS Switch On Resistance

VOUT = 3.3V

0.35

VOUT = 5V

0.20

RONPMOS PMOS Switch On Resistance

VOUT = 3.3V

0.45

VOUT = 5V

0.30

INMOS

NMOS Current Limit

850

Max Duty Cycle

VFB = 1V

fSW

Switching Frequency

0.95

1.2

1.5

MHz

Shutdown

VIH

Enable Input Threshold

VIL

0.3

IEN

EN Input Current

EN = 5.0V

0.01

µA

Power-OK

POK Voltage Low

IPOK=1mA

0.1

0.4

POK Leakage Current

VPOK = VIN or VOUT

100

Power-OK Threshold

Falling Edge

Thermal Protection

TENM

Overtemperature Protection

145

ºC

ΔTENM

Overtemperature Protection

Hysteresis

ºC

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