TC105
DS21349B-page 2 2002 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Voltage on V
DD
....................................... -0.3V to +12V
EXT
Output Current ........................................±100mA
Voltage on V
OUT
,EXT,
SHDN
Pins.....................................-0.3V to V
DD
+0.3V
Power Dissipation.............................................150mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature Range ..............-40°C to +125°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.
TC105 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Note 1, f
OSC
=300kHz;T
A
= 25°C, unless otherwise noted.
Symbol Parameter Min Typ Max Units Test Conditions
V
DD
Operating Supply Voltage 2.2 — 10.0 V
V
DD
MIN
Minimum Input Voltage 0.9 — 2.2 V EXT = High; No external components;
V
OUT
= 0V, SHDN =V
IN
I
DD
Operating Supply Current —
—
57
67
102
122
µA No external components; V
R
=3.0V,3.3V
V
OUT
= 0V, SHDN =V
IN
V
R
=5.0V
I
STBY
Standby Supply Current —
—
15
16
27
29
µA No external components; V
R
=3.0V,3.3V
V
OUT
=SHDN=V
IN
V
R
=5.0V
I
SHDN
Shutdown Supply Current — — 0.5 µA SHDN =GND
f
OSC
Oscillator Frequency 255 300 345 kHz V
IN
=V
OUT
+0.3V
V
OUT
Output Voltage V
R
x0.975 V
R
V
R
x1.025 Note2
DTYMAX Maximum Duty Cycle (PWM Mode) 100 — — %
DTYPFM Duty Cycle (PFM Mode) 15 25 35 % I
OUT
=0mA
V
IH
SHDN Input Logic High 0.65 — — V V
OUT
= 0V, No external components
V
IL
SHDN Input Logic Low — — 0.20 V V
OUT
= 0V, No external components
REXTH EXT
ON Resistance to V
DD
—
—
—
17
16
12
24
22
17
Ω No external components; V
R
=3.0V
V
R
=3.3V
V
R
=5.0V
V
OUT
= SHDN =V
IN
,V
EXT
=(V
IN
–0.4V)
REXTL EXT
ON Resistance to GND —
—
—
15
14
10
20
19
14
Ω No external components; V
R
=3.0V
V
R
=3.3V
V
R
=5.0V
V
OUT
= 0V, SHDN =V
IN
,V
EXT
=0.4V
η Efficiency — 92 — %
Note 1: V
R
=3.0V,V
IN
=4.5V,I
OUT
= 200mA
V
R
=3.3V,V
IN
=5.0V,I
OUT
= 220mA
V
R
=5.0V,V
IN
=7.5V,I
OUT
= 320mA
2: V
R
is the factory output voltage setting.
