AS1333 datasheet(4/16 Pages) AMSCO

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AS1333

Data Sheet - 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

TA = TJ = -40ºC to +85ºC; PVIN = VDD = EN = 3.6V, unless otherwise noted. Typ. values are at TA=25°C.

System Characteristics

TA = 25ºC; PVIN = VDD = EN = 3.6V, unless otherwise noted. The following parameters are verified by characterisation

and are not production tested.

Table 3. Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VFB

Feedback Voltage

PVIN = 3.6V

3.028

3.09

3.15

ISHDN

Shutdown supply current

EN = SW = 0V

1. Shutdown current includes leakage current of PFET.

0.01

µA

DC bias current into VDD

FB = 0V, No Switching

2. IQ specified here is when the part is operating at 100% duty cycle.

11.4

RDSON(P)

Pin-Pin Resistance for PFET

ISW = 200mA; TA = +25°C

140

200

ISW = 200mA

230

RDSON(N)

Pin-Pin Resistance for NFET

ISW = -200mA; TA = +25°C

300

415

ISW = -200mA

485

ILIM,PFET

Switch peak current limit

Current limit is built-in, fixed,

and not adjustable.

935

1100

1200

FOSC

Internal oscillator frequency

1.8

2.2

MHz

VIH,EN

Logic high input threshold

1.2

VIL,EN

Logic low input threshold

0.5

IPIN,ENABLE

Pin pull down current

µA

Table 4. System Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

T_ON

Turn on time (time for output to

reach 3.09V from Enable low to

high transition)

EN = Low to High, VIN = 4.2V,

VOUT = 3.09V, COUT = 10µF,

IOUT ≤ 1mA

210

350

µs

Efficiency

(L = 3.3µH, DCR

≤ 100mΩ)

VIN = 3.6V, VOUT = 3.09V,

IOUT = 400mA

VOUT_ripple

Ripple voltage, PWM mode

1. Ripple voltage should measured at COUT electrode on good layout PC board and under condition using sug-

gested inductors and capacitors.

VIN = 4.2V, VOUT = 3.09V,

IOUT = 10mA to 400mA

5mVp-p

Line_tr

Line transient response

VIN = 600mV perturbance, over Vin

range 3.4V to 5.5V

TRISE = TFALL = 10µs, VOUT = 3.09V,

IOUT = 100mA

mVpk

Load_tr

Load transient response

VIN = 4.2V, VOUT = 3.09V, transients

to 100mA, TRISE = TFALL = 10µs

mVpk

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