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TC1303A Datasheet(PDF) 15 Page - Microchip Technology

Part No. TC1303A
Description  500 mA Synchronous Buck Regulator, 300 mA LDO with Power-Good Output
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Maker  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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TC1303A Datasheet(HTML) 15 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
DS21949B-page 15
TC1303A/TC1303B/TC1303C/TC1304
Note: Unless otherwise indicated, VIN1 = VIN2 = SHDN1,2 = 3.6V, COUT1 =CIN = 4.7 µF, COUT2 =1 µF, L =4.7 µH,
VOUT1 (ADJ) = 1.8V, TA = +25°C. Boldface specifications apply over the TA range of -40°C to +85°C. TA = +25°C. Adjustable- or fixed-
output voltage options can be used to generate the Typical Performance Characteristics.
FIGURE 2-31:
PG Threshold Voltage vs.
Ambient Temperature.
FIGURE 2-32:
PG Output Voltage Level
Low vs. Ambient Temperature.
FIGURE 2-33:
PG Output Voltage Level
High vs. Ambient Temperature.
FIGURE 2-34:
VOUT2 Power Supply Ripple
Rejection vs. Frequency.
FIGURE 2-35:
VOUT2 Noise vs. Frequency.
FIGURE 2-36:
VOUT1 Load Step Response
vs. Time.
90
91
92
93
94
95
96
-40 -25 -10
5
20
35
50
65
80
95 110 125
Ambient Temperature (°C)
SHDN1 = VIN2
SHDN2 = VIN2
VIN = 3.6V
PG Threshold Hi
PG Threshold Low
0.01
0.012
0.014
0.016
0.018
0.02
Ambient Temperature (°C)
VIN = 3.6V
IOL = 1.2 mA
SHDN1 = VIN2
SHDN2 = VIN2
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-40 -25 -10
5
20
35
50
65
80
95 110 125
Ambient Temperature (°C)
VIN = 3.6V
IOH = 500 µA
VOUT2 = 2.8V
VOUT2 = 2.5V
VOUT2 = 1.5V
SHDN1 = VIN2
SHDN2 = VIN2
-80
-70
-60
-50
-40
-30
-20
-10
0
0.01
0.1
1
10
100
1000
Frequency (kHz)
SHDN1 = GND
VOUT2 = 1.5V
IOUT2 = 30 mA
CIN = 0 µF
COUT2 = 1.0 µF
COUT2 = 4.7 µF
0.01
0.1
1
10
0.01
0.1
1
10
100
1000
10000
Frequency (kHz)
SHDN1 = AGND
SHDN2 = VIN2
VIN = 3.6V
VOUT2 = 2.5V
IOUT2 = 50 mA


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