Datasheet


SLVS426 − MAY 2002
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4
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
(VIN)
= V
(VIN_SENSE12)
= V
(VIN_SENSE3)
= 12 V (unless otherwise noted)
VREF3.3
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
O
Output voltage
I
O
= 0 mA to 30 mA, V
(VIN)
= 5.5 V to 28 V,
T
A
= 25°C
3.15 3.30 3.45 V
Line regulation V
(
VIN)
= 5.5 V to 28 V, I
O
= 10 mA 20 mV
Load regulation I
O
= 1 mA to 10 mA, V
(VIN)
= 5.5 V 40 mV
I
OS
Short circuit output current V
(VREF3.3)
= 0 V, T
A
= 25°C −30 mA
Control
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IH
High-level input voltage SS_STBYx, STBY_LDO, PWM_SEL, STBY_VREF3.3/5 2.2 V
V
IL
Low-level input voltage SS_STBYx, STBY_LDO, PWM_SEL, STBY_VREF3.3/5 0.3 V
Output Voltage Monitor
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OVP comparator threshold SBRC, LDO 0.91 0.95 0.99 V
UVP comparator threshold SBRC, LDO 0.51 0.55 0.59 V
PG comparator low-level threshold 0.75 0.79 0.81 V
PG comparator high-level threshold 0.88 0.91 0.94 V
PG propagation delay from INVx, INV_LDO to PGOUT (no load at PG_DELAY)
Powergood H to L 6.5
s
PG propagation delay from INVx, INV_LDO to PGOUT (no load at PG_DELAY)
Powergood L to H 16
µ
s
I
(PG_DELAY)
PG_DELAY source current −1.8 µA
Timer latch current source
UVP protection −1.5 −2.3 −3.1 µA
Timer latch current source
OVP protection −80 −125 −180
Oscillator
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
osc
Oscillation frequency PWM mode, C
(CT)
= 44 pF, T
A
= 25°C 300 kHz
V
OH
High level output voltage
dc 1 1.1 1.2
V
V
OH
High level output voltage
f
osc
= 300 kHz 1.17
V
V
OL
Low level output voltage
dc 0.4 0.5 0.6
V
V
OL
Low level output voltage
f
osc
= 300 kHz 0.43
V
Error Amplifier for SBRC
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IO
Input offset voltage INVx voltage, T
A
= 25°C 2 10 mV
Open loop voltage gain 50 dB
Unity-gain bandwidth 2.5 MHz
I
O(snk)
Output sink current V
(FBx)
= 1 V 0.2 0.7 mA
I
O(src)
Output source current V
(FBx)
= 1 V −0.2 −0.9 mA
Duty Control
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Maximum duty control
CH1/3, f
osc
= 300 kHz, V
(INVx)
= 0 V 82%
Maximum duty control
CH2, f
osc
= 300 kHz, V
(INVx)
= 0 V 97%