TC1269
DS21380C-page 2 2002-2012 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage .........................................................6.5V
Output Voltage.................... (V
SS
– 0.3) to (V
IN
+ 0.3V)
Maximum Voltage on Any Pin ........V
IN
+0.3V to -0.3V
Power Dissipation................Internally Limited (Note 6)
Operating Temperature ...............-40°C < T
J
< +125°C
Storage Temperature..........................-65°C to +150°C
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
TC1269 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: V
IN
= V
OUT
+ 1V, I
L
= 0.1A, C
L
= 3.3F, SHDN > V
IH
, T
A
= 25°C, unless otherwise noted. Boldface
type specifications apply for junction temperatures of -40°C to +125°C.
Symbol Parameter Min Typ Max Units Test Conditions
V
IN
Input Operating Voltage — — 6.0 V
I
OUTMAX
Maximum Output Current 300 ——mA
V
OUT
Output Voltage —
V
R
– 2.5%
V
R
±0.5%
—
—
V
R
+ 2.5%
V Note 1
V
OUT
/TV
OUT
Temperature Coefficient — 40 — ppm/°C Note 2
V
OUT
/V
IN
Line Regulation — 0.05 0.35 %(V
R
+ 1V) V
IN
6V
V
OUT
/V
OUT
Load Regulation — 0.5 2.0 %I
L
= 0.1mA to I
OUTMAX
V
IN
-V
OUT
Dropout Voltage —
—
—
20
80
240
30
160
480
mV I
L
= 0.1mA
I
L
= 100mA
I
L
= 300mA (Note 4)
I
SS1
Supply Current — 50 90 A SHDN = V
IH
I
SS2
Shutdown Supply Current — 0.05 0.5 A SHDN = 0V
PSRR Power Supply Rejection Ratio — 50 — dB F
RE
120Hz
I
OUTSC
Output Short Circuit Current — 550 650 mA V
OUT
= 0V
V
OUT
/P
D
Thermal Regulation — 0.04 — V/W Note 5
eN Output Noise — 260 — nV/Hz
F = 1kHz, C
OUT
= 1F, R
LOAD
= 50
SHDN
Input
V
IH
SHDN Input High Threshold 45 ——%V
IN
V
IL
SHDN Input Low Threshold — — 15 %V
IN
Note 1: V
R
is the regulator output voltage setting.
2:
3: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from
0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specifica-
tion.
4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a 1V differen-
tial.
5: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or
line regulation effects. Specifications are for a current pulse equal to I
LMAX
at V
IN
= 6V for T = 10 msec.
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the
thermal resistance from junction-to-air (i.e., T
A
, T
J
,
JA
). Exceeding the maximum allowable power dissipation causes the device to initiate
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.
T
C
V
OUT
= (V
OUTMAX
– V
OUTMIN
) x 10
6
V
OUT
x T
