CAT6243
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4
Table 5. ELECTRICAL CHARACTERISTICS (V
IN
= (V
OUT
+ 1 V) or V
IN_MIN
, whichever is higher, C
IN
= 1 mF, C
OUT
= 2.2 mF, for
typical values T
A
= 25°C, for Bold values T
A
= −40°C to 85°C; unless otherwise noted.)
Symbol
Parameter Conditions Min Typ Max Unit
INPUT / OUTPUT
V
OUT
Output Voltage Range CAT6243−ADJ
CAT6243DC
0.8
0.8
4.5
5.0
V
V
OUT−ACC
Output Voltage Accuracy
CAT6243−ADJ
CAT6243DC
CAT6243DC
Initial accuracy, I
OUT
= 1 mA
−2
−2
−3
+2
+2
+3
%
V
ADJ
Voltage at ADJ input 0.784 0.8 0.816 V
TC
OUT
Output Voltage Temp. Coefficient
CAT6243−ADJ
CAT6243DC
25
50
ppm/°C
I
OUT
Output Current 0.0001 1 A
V
R−LINE
Line Regulation
V
IN
= V
OUT
+ 1.0 V to
V
IN(max)
, I
OUT
= 10 mA
−0.2 ±0.05 0.2
%/V
V
IN
= V
OUT
+ 1.0 V to
V
IN(max)
, I
OUT
= 10 mA
−0.35 0.35
V
R−LOAD
Load Regulation
I
OUT
= 100 mA to 1000 mA
1.5 2
%
I
OUT
= 100 mA to 1000 mA
3
V
DO
V
OUT
= 1.2 V
I
OUT
= 300 mA
T
A
= 25°C
600
mV
V
OUT
= 2.5 V CAT6243−ADJ
CAT6243DC
110
130
V
OUT
= 3.3 V 85
V
OUT
= 1.2 V CAT6243−ADJ
CAT6243DC
I
OUT
= 1 A
T
A
= 25°C
625
650
V
OUT
= 2.5 V CAT6243−ADJ
CAT6243DC
350
400
V
OUT
= 3.3 V 275
I
ADJ
ADJ Input Current 100 nA
I
GND
Ground Current
I
OUT
= 0 mA
70 mA
I
OUT
= 0 mA
100
I
OUT
= 1000 mA 140 200
I
OUT
= 1000 mA 250
I
GND−SD
Shutdown Ground Current
CAT6243−ADJ
CAT6243DC
V
EN
< 0.4 V
2
5
mA
ISC Output short circuit current limit V
OUT
= 0 V 900 mA
PSRR AND NOISE
PSRR
Power Supply Rejection Ratio
CAT6243
f = 1 kHz, BYP = 470 pF,
I
OUT
= 10 mA
54
dB
f = 20 kHz, BYP = 470 pF,
I
OUT
= 10 mA
42
e
N
Output Noise Voltage for 1.8 V output BW = 10 Hz to 100 kHz
BYP = 470 pF, I
OUT
= 10 mA
45
mVrms
UVLO, R
OUT
AND ESR
V
UVLO
Under voltage lockout threshold 1.65 1.75 V
R
OUT−SH
ON resistance of Discharge Transistor 150
W
ESR C
OUT
equivalent series resistance 5 500
mW
7. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
J
= T
A
= 25_C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
