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
T
A
= T
J
= -40ºC to +85ºC; PV
IN
= VDD = EN = 3.6V, unless otherwise noted. Typ. values are at T
A
=25°C.
Table 3. Electrical Characteristics
Symbol
V
FB
I
SHDN
I
Q
R
DSON(P)
Parameter
Feedback Voltage
Shutdown supply current
DC bias current into VDD
Pin-Pin Resistance for PFET
Conditions
PV
IN
= 3.6V
EN = SW = 0V
1
2
Min
3.028
Typ
3.09
0.01
1
140
Max
3.15
2
1.4
200
230
Units
V
µA
mA
mΩ
FB = 0V, No Switching
I
SW
= 200mA; T
A
= +25°C
I
SW
= 200mA
R
DSON(N)
I
LIM,PFET
F
OSC
V
IH,EN
V
IL,EN
I
PIN,ENABLE
Pin-Pin Resistance for NFET
Switch peak current limit
Internal oscillator frequency
Logic high input threshold
Logic low input threshold
Pin pull down current
I
SW
= -200mA; T
A
= +25°C
I
SW
= -200mA
Current limit is built-in, fixed,
and not adjustable.
935
1.8
1.2
300
415
485
mΩ
mA
MHz
V
1100
2
1200
2.2
0.5
5
10
V
µA
1. Shutdown current includes leakage current of PFET.
2. I
Q
specified here is when the part is operating at 100% duty cycle.
System Characteristics
T
A
= 25ºC; PV
IN
= VDD = EN = 3.6V, unless otherwise noted. The following parameters are verified by characterisation
and are not production tested.
Table 4. System Characteristics
Symbol
T
_ON
η
Parameter
Turn on time (time for output to
reach 3.09V from Enable low to
high transition)
Efficiency
(L = 3.3µH, DCR
≤
100mΩ)
Ripple voltage, PWM mode
1
Conditions
EN = Low to High, V
IN
= 4.2V,
V
OUT
= 3.09V, C
OUT
= 10µF,
I
OUT
≤
1mA
V
IN
= 3.6V, V
OUT
= 3.09V,
I
OUT
= 400mA
V
IN
= 4.2V, V
OUT
= 3.09V,
I
OUT
= 10mA to 400mA
V
IN
= 600mV perturbance, over Vin
range 3.4V to 5.5V
T
RISE
= T
FALL
= 10µs, V
OUT
= 3.09V,
I
OUT
= 100mA
V
IN
= 4.2V, V
OUT
= 3.09V, transients
up
to 100mA, T
RISE
= T
FALL
= 10µs
Min
Typ
210
Max
350
Units
µs
96
5
%
mVp-p
V
OUT
_ripple
Line_tr
Line transient response
50
mVpk
Load_tr
Load transient response
50
mVpk
1. Ripple voltage should measured at C
OUT
electrode on good layout PC board and under condition using sug-
gested inductors and capacitors.
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