TC1303C-1A1EMF
| Model | TC1303C-1A1EMF |
| Description | 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10, 3 X 3 MM, 0.9 MM HEIGHT, PLASTIC, DFN-10 |
| PDF file | Total 38 pages (File size: 756K) |
| Chip Manufacturer | MICROCHIP |
TC1303A/TC1303B/TC1303C/TC1304
DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
V
IN1
=V
IN2
= SHDN1,2 = 3.6V, C
OUT1
= C
IN
= 4.7 µF, C
OUT2
= 1 µF, L = 4.7 µH, V
OUT1
(ADJ) = 1.8V,
I
OUT1
= 100 mA, I
OUT2
= 0.1 mA T
A
= +25°C.
Boldface
specifications apply over the T
A
range of
-40°C to +85°C.
Parameters
Adjustable Output Voltage Range
Adjustable Reference Feedback
Voltage (V
FB1
)
Feedback Input Bias Current
(
IFB1
)
Output Voltage Tolerance Fixed
(V
OUT1
)
Line Regulation (V
OUT1
)
Load Regulation (V
OUT1
)
Dropout Voltage V
OUT1
Internal Oscillator Frequency
Start Up Time
R
DSon
P-Channel
R
DSon
N-Channel
L
X
Pin Leakage Current
Positive Current Limit Threshold
LDO Output (V
OUT2
)
Output Voltage Tolerance (V
OUT2
)
Temperature Coefficient
Line Regulation
Load Regulation, V
OUT2
≥
2.5V
Load Regulation, V
OUT2
< 2.5V
Dropout Voltage V
OUT2
> 2.5V
Power Supply Rejection Ratio
Output Noise
Note 1:
2:
3:
4:
5:
6:
V
OUT2
TCV
OUT
∆V
OUT2
/
∆V
IN
∆V
OUT2
/
I
OUT2
∆V
OUT2
/
I
OUT2
V
IN
– V
OUT2
PSRR
eN
-2.5
—
-0.2
-0.75
-0.9
—
—
—
±0.3
25
±0.02
-0.08
-0.18
137
205
62
1.8
+2.5
—
+0.2
+0.75
+0.9
300
500
—
—
%
ppm/°C
%/V
%
%
mV
dB
µV/(Hz)
�½
(V
R
+1V)
≤
V
IN
≤
5.5V
I
OUT2
= 0.1 mA to 300 mA (Note
I
OUT2
= 0.1 mA to 300 mA (Note
I
OUT2
= 200 mA (Note
I
OUT2
= 300 mA
f
≤
100 Hz, I
OUT1
= I
OUT2
= 50 mA,
C
IN
= 0 µF
f
≤
1 kHz, I
OUT2
= 50 mA,
SHDN1 = GND
Sym
V
OUT1
V
FB1
I
VFB1
V
OUT1
V
LINE-REG
V
LOAD-REG
V
IN
– V
OUT1
F
OSC
T
SS
R
DSon-P
R
DSon-N
I
LX
+I
LX(MAX)
Min
0.8
0.78
—
-2.5
—
—
—
1.6
—
—
—
-1.0
—
Typ
—
0.8
-1.5
±0.3
0.2
0.2
280
2.0
0.5
450
450
±0.01
700
Max
4.5
0.82
—
+2.5
—
—
—
2.4
—
—
—
1.0
—
Units
V
V
nA
%
%/V
%
mV
MHz
ms
mΩ
mΩ
μA
mA
T
R
= 10% to 90%
I
P
=100 mA
I
N
=100 mA
SHDN = 0V, V
IN
= 5.5V, L
X
= 0V,
L
X
= 5.5V
V
IN
=V
R
+1V to 5.5V,
I
LOAD
= 100 mA
V
IN
= V
R
+ 1.5V, I
LOAD
= 100 mA to
500 mA (Note
1)
I
OUT1
= 500 mA, V
OUT1
= 3.3V
5)
Conditions
Synchronous Buck Regulator (V
OUT1
)
7:
8:
The Minimum V
IN
has to meet two conditions: V
IN
≥
2.7V and V
IN
≥
V
RX
+ V
DROPOUT,
V
RX
= V
R1
or V
R2
.
V
RX
is the regulator output voltage setting.
TCV
OUT2
= ((V
OUT2max
– V
OUT2min
) * 10
6
)/(V
OUT2
* D
T
).
Regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested
over a load range from 0.1 mA to the maximum specified output current.
Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value measured at a 1V differential.
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
). Exceeding the maximum allowable power
dissipation causes the device to initiate thermal shutdown.
The integrated MOSFET switches have an integral diode from the L
X
pin to V
IN
, and from L
X
to P
GND
. In cases where
these diodes are forward-biased, the package power dissipation limits must be adhered to. Thermal protection is not
able to limit the junction temperature for these cases.
V
IN1
and V
IN2
are supplied by the same input source.
DS21949C-page 8
©
2008 Microchip Technology Inc.
