TC2054/2055/2186
DS21663D-page 4 © 2009 Microchip Technology Inc.
TEMPERATURE CHARACTERISTICS
Thermal Regulation ΔV
OUT/
ΔP
D
—0.04— V/WNote 8
Thermal Shutdown Die
Temperature
T
SD
— 160 — °C
Output Noise eN — 600 — nV /
√Hz
I
L
= I
OUT
MAX
, F = 10 kHz
Response Time
(from Shutdown Mode)
t
R
—60—µsV
IN
= 4V
C
IN
= 1 µF, C
OUT
= 10 µF
I
L
= 0.1 mA, Note 11
SHDN
Input
SHDN
Input High Threshold V
IH
60 — — %V
IN
V
IN
= 2.5V to 6.0V
SHDN
Input Low Threshold V
IL
——15%V
IN
V
IN
= 2.5V to 6.0V
ERROR
OUTPUT
Minimum V
IN
Operating
Voltage
V
INMIN
1.0 — — V I
OL
= 0.1 mA
Output Logic Low Voltage V
OL
— — 400 mV 1 mA Flows to ERROR,
I
OL
= 1 mA, V
IN
= 2V
ERROR
Threshold Voltage V
TH
— 0.95 x V
R
— V See Figure 4-2
ERROR
Positive Hysteresis V
HYS
—50—mVNote 10
V
OUT
to ERROR Delay t
DELAY
—2—msV
OUT
from V
R
= 3V to 2.8V
Resistance from ERROR
to
GND
R
ERROR
— 126 — Ω V
DD
= 2.5V, V
OUT
= 2.5V
Electrical Specifications: Unless otherwise noted, V
DD
= +2.7V to +6.0V and V
SS
= GND.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges:
Extended Temperature Range T
A
-40 — +125 °C
Operating Temperature Range T
A
-40 — +125 °C
Storage Temperature Range T
A
-65 — +150 °C
Thermal Package Resistances:
Thermal Resistance, 5L-SOT-23 θ
JA
— 255 — °C/W
ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Specifications: Unless otherwise noted, V
IN
= V
R
+ 1V, I
L
= 100 µA, C
L
= 3.3 µF, SHDN > V
IH
, T
A
= +25°C.
BOLDFACE type specifications apply for junction temperature of -40°C to +125°C.
Parameter Sym Min Typ Max Units Conditions
Note 1: The minimum V
IN
has to meet two conditions: V
IN
= 2.7V and V
IN
= V
R
+ V
DROPOUT
.
2: V
R
is the regulator output voltage setting. For example: V
R
= 1.8V, 2.7V, 2.8V, 2.85V, 3.0V, 3.3V.
3: TCV
OUT
=
4:
5:
6: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested
over a load range from 1.0 mA to the maximum specified output current. Changes in output voltage due to heating
effects are covered by the thermal regulation specification.
7: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal
value at a 1V differential.
8: 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
MAX
at V
IN
= 6V for T = 10 ms.
9: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction tem-
perature and the thermal resistance from junction-to-air (i.e. T
A
, T
J
, θ
JA
).
10: Hysteresis voltage is referenced by V
R
.
11: Time required for V
OUT
to reach 95% of V
R
(output voltage setting), after V
SHDN
is switched from 0 to V
IN
.
V
OUTMAX
V
OUTMIN
–()10
6
×
V
OUT
ΔT×
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