AS1332 Datasheet, PDF (5/19 Pages) ams AG – 650mA, Step-Down DC-DC Converter for RF Power Amplifiers

AS1332
Datasheet - Electrical Characteristics
System Characteristics
T_A = 25ºC; PVIN = VDD = EN = 3.6V, unless otherwise noted. The following parameters are verfied by characterisation
and are not production tested.
Table 4. System Characteristics
Symbol
Parameter
Control Inputs
T_RESP
Time for VOUT to rise from
1.3V to 3.16V
Time for VOUT to fall from
3.16V to 1.3V
Conditions
VIN = 4.2V, C_OUT = 4.7µF,
L = 3.3µH, R_LOAD = 5Ω
VIN = 4.2V, C_OUT = 4.7µF,
L = 3.3µH, R_LOAD = 10Ω
Min
Typ
Max
Unit
s
20 30
µs
20 30
C_CON VCON Input Capacitance
Linearity in Control
Linearity _{Range 0.556V to 1.208V}
VCON = 1V, Test frequency = 100 kHz
VIN = 3.6V,
Monotonic in nature
-3
20 pF
+3 %
T_{_ON}
Turn-On Time
EN = Low to High, VIN = 4.2V,
(time for output to reach 3.16V from
enable low to high transition)
VOUT = 3.16V, C_OUT = 4.7µF, I_OUT ≤ 1mA
Performance Parameters
210 750 µs
Efficiency
η
(L = 3.3µH, DCR ≤ 100mΩ)
VOUT-
ripple
Ripple voltage, PWM mode¹
Line_tr Line transient response
Load_tr Load transient response
VIN = 3.6V, VOUT = 1.3V,
PSRR _{IOUT = 100mA}
VIN = 3.6V, VOUT = 1.3V, I_OUT = 90mA
VIN = 3.6V, VOUT = 3.16V, I_OUT = 400mA
VIN = 3V to 4.5V, VOUT = 1.3V,
I_OUT = 10mA to 400mA
VIN = 600mV perturbance, over Vin range
3V to 5.5V; T_RISE = T_FALL = 10µs,
VOUT = 1.3V, I_OUT = 100mA
VIN = 3.1/3.6/4.5V, VOUT = 1.3V, transients
up to 100mA, T_RISE = T_FALL = 10µs
sine wave perturbation frequency = 10kHz,
amplitude = 100mVp-p
87
%
96
10
mVp
-p
50
mVp
k
50
mVp
k
40
dB
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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