MAS 3504D
4.2.4.4. DC/DC Converter Characteristics
at TA = −30 to 85 °C, VSUP = 3.0 V, CLKF = 14.725 MHz, fsw = 230 kHz, typ. values at TA = +27 °C
Unless otherwise noted: VOUT = 3.0 V, VIN = 1.2 V
Note: The following characterizations were made with voltage and clock input that is not usable for G.729 applica-
tions.
Symbol
Parameter
Pin Name Min.
Typ.
Max.
Unit
Test Conditions
1)
VIN1
Minimum start-up input voltage
0.9
1.1
V
ILOAD = 0 mA
DCCF = 08000hex
(Reset)
1)
VIN2
Minimum operating input
voltage
0.6
1.3
0.9
1.8
V
V
ILOAD = 55 mA,
DCCF = 08000hex
(Reset)
ILOAD = 250 mA,
DCCF = 08000hex
(Reset)
VOUT
Output voltage range
Bits 16..14, Bit 9 of DCCF
Register [hex]:
VSENS
3.567
3.460
3.354
3.248
3.144
3.039
2.935
2.831
2.729
2.625
2.524
2.422
2.321
2.219
2.118
2.017
V
VIN = 1.2 V
1C000
18000
14000
10000
0C000
08000
04000
00000
1C200
18200
14200
10200
0C200
08200
04200
00200
I
LOAD = 50 mA
VOTOL
Output voltage tolerance
VSENS
VSENS
−3.6
3.6
%
ILOAD = 50 mA
Tj = 27 °C
VIN = 1.2 V
ILOAD1
ILOAD2
Output current
150
250
mA
mA
%/V
VIN = 0.9..1.5 V
VIN = 1.8..3.0 V
ILOAD = 50mA
dVOUT/dVIN/
VOUT
Line regulation
Line regulation
VSENS
VSENS
0.35
0.7
dVOUT/dVIN/
VOUT
%/V
ILOAD = 250 mA,
VOUT = 3.5 V,
VIN = 2.4 V
dVOUT/VOUT
dVOUT/VOUT
Load regulation
Load regulation
VSENS
VSENS
−0.5
−0.5
%
%
ILOAD = 50...150 mA,
ILOAD = 50..250 mA,
VOUT = 3.5 V,
VIN = 2.4 V
1)
All measurements are made with a C8 R/4L 20 µH, 25 mΩ ferrite ring-core coil, Zetex ZLMCS1000 Schottky
diode, and Sanyo/Oscon 6SA330M 330 µF, 25 mΩ ESR capacitors at input and output (see Section 4.2.4. on
page 28).
34
Micronas
MICRONAS [ MICRONAS ]
