TC2054 Datasheet, PDF (3/16 Pages) Microchip Technology – 50mA, 100mA, and 150mA CMOS LDOs with Shutdown and Error Output

TC2054/2055/2186
Electrical Characteristics: V_IN = V_R + 1V, I_L = 100µA, C_L = 3.3µF, SHDN > V_IH, T_A = 25°C, unless otherwise noted. BOLDFACE
type specifications apply for junction temperature of -40°C to +125°C.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
SHDN Input
V_IH
SHDN Input High Threshold
60
—
—
%V_IN V_IN = 2.5V to 6.0V
V_IL
SHDN Input Low Threshold
—
—
15
%V_IN V_IN = 2.5V to 6.0V
ERROR OUTPUT
V_INMIN
Minimum V_IN Operating Volt-
1.0
—
age
—
V
V_OUT ≥ 2.7V
V_OL
V_TH
V_HYS
t_DELAY
R_ERROR
Output Logic Low Voltage
ERROR Threshold Voltage
ERROR Positive Hysteresis
V_OUT to ERROR Delay
Resistance from ERROR to
GND
—
—
400
mV 1 mA Flows to ERROR
—
0.95 x V_R
—
—
50
—
V See Figure 4-2
mV Note 8
—
2
—
msec V_OUT from V_R = 3V to 2.8V
—
126
—
Ω V_DD = 2.5V, V_OUT = 2.5V
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 = _{-(--V----O-----U-----T----M------A----X------–----V-----O-----U----T-----M-----I--N-----)---×-----1----0---}6_--
VOUT × ∆T
4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a
load range from 1.0mA to the maximum specified output current. Changes in output voltage due to heating effects are covered
by the thermal regulation specification.
5: 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.
6: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, exclud-
ing load or line regulation effects. Specifications are for a current pulse equal to I_MAX at V_IN = 6V for T = 10msec.
7: 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, θ_JA).
8: Hysteresis voltage is referenced by V_R.
9: Time required for V_OUT to reach 95% of V_R (output voltage setting), after V_SHDN is switched from 0 to V_IN.
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin Number
1
2
3
4
5
Symbol
V_IN
GND
SHDN
ERROR
V_OUT
Description
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 0.5µA (max).
Out-of-Regulation Flag. (Open drain output). This output goes low when
V_OUT is out-of-tolerance by approximately -5%.
Regulated voltage output.
© 2002 Microchip Technology Inc.
DS21663B-page 3