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| 型号： | TPS84320RUQT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 390 kHz SWITCHING FREQ-MAX, PQCC47 |
| 封装： | 9 X 15 MM, 2.80 MM HEIGHT, GREEN, PLASTIC, QFN-47 |
| 文件页数： | 24/28页 |
| 文件大小： | 903K |
| 代理商： | TPS84320RUQT |
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PWRGD
VIN
PVIN
PGND
PH
VOUT
RT/CLK
AGND
VADJ
INH/UVLO
STSEL
SS/TR
VSENSE+
TPS84320
PWRGD
Logic
+
VREF
Comp
Power
Stage
and
Control
Logic
Thermal Shutdown
Shutdown
Logic
OCP
VIN
UVLO
OSC w/PLL
SLUSAH7
– SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS (continued)
Over -40
°C to 85°C free-air temperature, PVIN = VIN = 12 V, VOUT = 1.8 V, IOUT = 3A,
CIN1 = 2x 22 F ceramic, CIN2 = 68 F poly-tantalum, COUT1 = 4x 47 F ceramic (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Ceramic
22 (4)
CIN
External input capacitance
F
Non-ceramic
68(4)
Ceramic
200 (5)
1500
F
COUT
External output capacitance
Non-ceramic
5000
Equivalent series resistance (ESR)
35
m
(4)
A minimum of 68
F of polymer tantalum and/or ceramic external capacitance is required across the input (VIN and PGND connected)
for proper operation. Locate the capacitor close to the device. See Table 5 for more details. When operating with split VIN and PVIN
rails, place 4.7
F of ceramic capacitance directly at the VIN pin to PGND.
(5)
The amount of required output capacitance varies depending on the output voltage (see Table 3 ). The amount of required capacitance
must include ceramic capacitance. Locate the capacitance close to the device. Adding additional capacitance close to the load improves
DEVICE INFORMATION
FUNCTIONAL BLOCK DIAGRAM
Copyright
2011, Texas Instruments Incorporated
5
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