Datasheet

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SLVS289A − MARCH 2000 − REVISED OCTOBER 2000
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics T
J
= 0° to 125°C, V
CC
= 2.8 V to 5.5 V (unless otherwise noted) (continued)
slow-start
PARAMETER CONDITIONS MIN TYP MAX UNITS
Charge current
V
(S/S)
= 0.5 V,
Resistance from VREFB pin to ANAGND = 20 kΩ
VREFB = 1.3 V, Ichg = (I
VREFB
/5)
10.4 13 15.6 µA
Discharge current V
(S/S)
= 1.3 V 3 mA
Comparator input offset voltage 10 mV
Comparator input bias current See Note 2 10 100 nA
Hysteresis accuracy −7.5 7.5 mV
Comparator propagation delay Overdrive = 10 mV, See Note 2 560 1000 ns
NOTE 2. Ensured by design, not production tested.
V
CC
UVLO
PARAMETER CONDITIONS MIN TYP MAX UNITS
Start threshold
(see Note 2) 2.72 2.80
V
Start threshold
T
J
= −40°C, See Note 2 2.71
V
Stop threshold (see Note 2) 2.48 V
NOTE 2. Ensured by design, not production tested.
power good
PARAMETER CONDITIONS MIN TYP MAX UNITS
Undervoltage trip point ripple regulator
V
IN
and VDRV above UVLO thresholds 90 93 95
% V
REF
Undervoltage trip point ripple regulator
(VSENSE−RR)
T
J
= −40°C, See Note 2 93
% V
REF
Undervoltage trip point LDO
V
IN
and VDRV above UVLO thresholds 90 93 95
% V
REF
Undervoltage trip point LDO
(VSENSE−LDO)
T
J
= −40°C, See Note 2 93
% V
REF
Output saturation voltage I
O
=5 mA 0.5 0.75 V
Leakage current V
PGD
= 4.5 V 1 µA
Hysteresis
V
REF
= 1.3 V, 1.5 V, or 1.8 V 50 75 mV
Hysteresis
V
REF
= 2.5 V, or 3.3 V 100 125 mV
Comparator high-low transition time
(propagation delay only)
See Note 2 1 µs
Comparator low-high transition time
(propagation delay + deglitch)
See Note 2 0.2 1 2 ms
NOTE 2. Ensured by design, not production tested.
droop compensation
PARAMETER CONDITIONS MIN TYP MAX UNITS
Initial accuracy V
DROOP
= 50 mV 46 54 mV
overcurrent protection (RR)
PARAMETER CONDITIONS MIN TYP MAX UNITS
OCP trip point 118 130 142 mV
Input bias current 300 nA
Comparator propagation delay time V
overdrive
= 30 mV, See Note 2 1 µs
Deglitch time (includes comparator
propagation delay time)
V
overdrive
= 30 mV, See Note 2 2.25 11 µs
NOTE 2. Ensured by design, not production tested.