Datasheet

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   
SLVS167C − SEPTEMBER 1998 − REVISED − MAY 1999
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics, V
I(IN)
= 4.3 V, I
O
= 10 mA, EN = 0 V, C
O
= 4.7 µF/CSR
†
= 1 Ω,
SENSE/FB shorted to OUT (unless otherwise noted) (continued)
adjustable regulator
PARAMETER TEST CONDITIONS
‡
T
J
MIN TYP MAX UNIT
Reference voltage (1FB)
5 mA
≤
I
O
≤
750 mA,
25°C 1.182
V
Reference voltage (1FB)
5 mA ≤ I
O
≤ 750 mA,
See NOTE 2
−40°C to 125°C 1.147 1.217
V
Reference voltage temperature coef-
ficient
−40°C to 125°C 61 75 ppm/°C
50 µA
≤
I
O
≤
750 mA,
25°C 0.52 1
Pass-element series resistance (see
50 µA ≤ I
O
≤ 750 mA,
See NOTE 2
−40°C to 125°C 1
Ω
Pass-element series resistance (see
Note 3)
V
I
= 3.9 V, 50 µA ≤ I
O
≤ 750 mA
25°C 0.32
Ω
Note 3)
V
I
= 5.9 V, 50 µA ≤ I
O
≤ 750 mA 25°C 0.23
Input regulation V
I
= 3.5 V, 50 µA ≤ I
O
≤ 750 mA 25°C 3 mV
Output regulation
I
O
= 5 mA to 750 mA,
See NOTE 2
25°C 7 mV
Output regulation
I
O
= 50 µA to 750 mA,
See NOTE 2
25°C 10 mV
Ripple rejection
f = 120 Hz, I
O
= 50 µA 25°C 59
dB
Ripple rejection
f = 120 Hz, I
O
= 500 mA
25°C 54
dB
Output noise-spectral density f = 120 Hz 25°C 2 mV/√Hz
10 Hz f 100 kHz,
C
L
= 4.7 µF 25°C 95
Output noise voltage
10 Hz ≤ f ≤ 100 kHz,
CSR = 1 Ω
C
L
= 10 µF 25°C 89
µV/rms
Output noise voltage
CSR = 1 Ω
C
L
= 100 µF 25°C 74
µV/rms
V
(TO)
Trip-threshold voltage (RESET)
§
V
O(FB)
decreasing −40°C to 125°C 1.101 1.145 V
V
hys
Hysteresis voltage (RESET)
§
Measured at V
O(ER)
25°C 12 mV
V
OL
Low-level output voltage (RESET)
§
V
I
= 2.13 V, I
O(RESET)
= 400 A
25°C 0.1 0.4
V
V
OL
Low-level output voltage (RESET)
§
V
I
= 2.13 V, I
O(RESET)
= 400 µA
−40°C to 125°C 0.4
V
I
I
Input current (1FB)
25°C −10 0.1 10
nA
I
I
Input current (1FB)
−40°C to 125°C −20 20
nA
†
CSR (compensation series resistance) refers to the total series resistance, including the equivalent series resistance (ESR) of the capacitor,
any series resistance added externally, and PWB trace resistance to C
L
.
‡
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must
be taken into account separately.
§
Output voltage programmed to 2.5 V with closed-loop configuration (see application information)
NOTE 3: To calculate dropout voltage, use equation:
V
DO
+ I
O
r
DS(ON)
r
DS(ON)
is a function of both output current and input voltage. This parametric table lists r
DS(ON)
for V
I
= 3.9 V and 5.9 V, which corresponds to
dropout conditions for programmed output voltages of 4 V and 6 V respectively. For other programmed values, refer to Figure 29.