TC1054 TelCom Semiconductor, TC1054 Datasheet - Page 9

• Manufacturer Part Number: TC1054
• Description: 50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT
• Manufacturer: TelCom Semiconductor

PIN DESCRIPTION
100mA CMOS LDO WITH SHUTDOWN
AND ERROR OUTPUT
ELECTRICAL CHARACTERISTICS:
Symbol
ERROR Open Drain Output
V
V
V
V
NOTES: 1. V
TC1055-01 6/5/97
(SOT-23A-5)
MIN
OL
TH
HYS
Pin No.
1
2
3
4
5
2. TC V
3. Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load
4. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value.
5. Ground pin current is the regulator pass transistor gate current. The total current drawn from the input supply is the sum of the load
6. Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load
7. The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the
8. Hysteresis voltage is referenced by V
9. Boldface type specifications apply for junction temperatures of – 40 C to +125 C.
range from 0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the
thermal regulation specification.
current, ground current and supply current (i.e. I
or line regulation effects. Specifications are for a current pulse equal to I
thermal resistance from junction-to-air (i.e. T
initiate thermal shutdown. Please see Thermal Considerations section of this data sheet for more details.
R
is the regulator output voltage setting. V
OUT
Parameter
Minimum Operating Voltage
Output Logic Low Voltage
ERROR Threshold Voltage
ERROR Positive Hysteresis
= (V
Symbol
ERROR
SHDN
V
GND
V
OUT
IN
OUT MAX –
V
OUT
V
x
OUT MIN
T
) x 10
Unregulated supply input.
Ground terminal.
Shutdown control input. The regulator is fully enabled when a logic high is applied to this input.
The regulator enters shutdown when a logic low is applied to this input. During shutdown, output
voltage falls to zero, ERROR is open circuited and supply current is reduced to 0.05 microamp
(typical).
Out-of-Regulation Flag. (Open drain output). This output goes low when V
by approximately – 5%.
Regulated voltage output.
Description
R
6
.
R
V
= 2.5V, 2.7V, 3.0V, 3.3V, 5.0V.
A
IN
, T
= V
1mA Flows to ERROR
See Figure 2
Test Conditions
Note 8
IN
J
, q
= I
OUT
JA
SUPPLY
). Exceeding the maximum allowable power dissipation causes the device to
+ 1V, I
+ I
3
L
GND
= 0.1 A, C
+ I
LOAD
LMAX
L
).
= 3.3 F, SHDN > V
at V
IN
Min
1.0
—
—
—
= 6V for T = 10msec.
PRELIMINARY INFORMATION
0.95 x V
IH
Typ
50
, T
—
—
A
= 25 C, unless otherwise noted.
R
Max
400
—
—
—
OUT
is out-of-tolerance
TC1055
Units
mV
mV
V
V