TC1305(2001) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC1305
(Rev.:2001)
(Rev.:2001)
Microchip Technology
TC1305 Datasheet PDF : 10 Pages
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Dual 150mA CMOS LDO With Select
ModeTM, Shutdown and Independent
RESET Output
TC1305
ELECTRICAL CHARACTERISTICS: VIN = VR + 1V, IL = 100µA, CL = 3.3µF, SHDN1 > VIH, SHDN2 > VIH, TA = 25°C, unless
otherwise noted. Boldface type specifications apply for junction temperatures of – 40°C to +125°C.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
RESET Output
VDET
VTH
IVDET
VDET Voltage Range
Reset Threshold
Reset Circuit Supply Current
Reset Threshold Tempco
TA = 0°C to +70°C
TA = – 40°C to +125°C
TA = +25°C
TA = – 40°C to +125°C
RESET = Open
1.0
—
6.0
V
1.2
—
6.0
2.59
2.63
2.66
V
2.55
—
2.70
—
20
40
µA
—
30
—
ppm/°C
VDET to Reset Delay
VDET = VTH to (VTH – 100mV)
—
Reset Active Timeout Period
140
100
—
µsec
300
560
msec
VOL
RESET Output Voltage Low
VDET = VTH min, ISINK = 1.2mA
—
—
0.3
V
VDET = VTH min, ISINK = 3.2mA
—
—
0.4
VDET > 1.0V, ISINK = 50µA
—
—
0.3
VOH
RESET Output Voltage High VDET > VTH max, ISOURCE = 500µA 0.8 VDET
—
—
V
VDET> VTH max, ISOURCE = 800µA VDET – 1.5
—
NOTES: 1. The minimum VIN has to meet two conditions: VIN ≥ 2.7V and VIN ≥ VR + VDROPOUT.
2. VR is the regulator output voltage setting. For example: VR = 2.5V, 2.8V, 3.0V.
3. TCVOUT = (VOUTMAX – VOUTMIN) x 10 6
VOUT x ∆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 0.1mA
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, excluding load or
line regulation effects. Specifications are for a current pulse equal to ILMAX at VIN = 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. TA, TJ, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate thermal
shutdown. Please see Thermal Considerations section of this data sheet for more details.
PIN DESCRIPTION
Pin No.
(10-Pin MSOP) Symbol
Description
1
VDET
2
VIN
3
GND
4
SELECT
5
SHDN1
6
SHDN2
7
Bypass
8
VOUT1
9
VOUT2
10
RESET
Detected input voltage. VDET and VIN can be connected together.
Power supply input.
Ground terminal.
Tri-state input for setting VOUT1 and VOUT2 . SELECT = GND for VOUT1 = VOUT2 = 2.5V,
SELECT = VIN for VOUT1 = VOUT2 = 3.0V and SELECT = No connect for VOUT1 = VOUT2 = 2.8V.
Shutdown control input for VOUT1. Regulator 1 is fully enabled when a logic high is applied to
this input. Regulator 1 enters shutdown when a logic low is applied to this input. During
shutdown, regulator output voltage falls to zero, RESET output remains valid.
Shutdown control input for VOUT2. Regulator 2 is fully enabled when a logic high is applied to
this input. Regulator 2 enters shutdown when a logic low is applied to this input. During
shutdown, regulator output voltage falls to zero, RESET output remains valid.
Reference bypass input. Connecting a 470pF to this input further reduces output noise.
Regulated voltage output 1.
Regulated voltage output 2.
RESET Output. RESET = Low when VDET is below the Reset Threshold Voltage.
RESET = High when VDET is above the Reset Threshold Voltage.
© 2001 Microchip Technology Inc. DS21526A
3
TC1305-1 12/22/00
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