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參數(shù)資料
| 型號： | TPS65257RHAT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, VQFN-40 |
| 文件頁數(shù)： | 32/34頁 |
| 文件大小： | 2100K |
| 代理商： | TPS65257RHAT |
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SLVSB32
– SEPTEMBER 2011
TERMINAL FUNCTIONS (continued)
NAME
NO.
I/O
DESCRIPTION
USB1 fault flag output, open drain, active low. Asserted when overcurrent
USB_nFAULT
35
I
or overtemperature condition is detected in the switch.
LX3
36, 37
O
Switching node for Buck3
VIN3
38
I
Input supply for Buck3. Fit a 10-
F ceramic capacitor close to this pin.
Bootstrap capacitor for Buck3. Fit a 47-nF ceramic capacitor from this pin
BST3
39
I
to the switching node.
Enable pin for Buck3. A high signal on this pin enables the converter. For
EN3
40
I
a delayed start-up add a small ceramic capacitor from this pin to ground.
PowerPAD. Connect to system ground for electrical and thermal
PowerPAD
connection.
ABSOLUTE MAXIMUM RATINGS
(1)
over operating free-air temperature range (unless otherwise noted, all voltages are with respect to GND)
Voltage range at VIN1,VIN2, VIN3, LX1, LX2, LX3
–0.3 to 18
V
Voltage range at LX1, LX2, LX3 (maximum withstand voltage transient
< 10 ns)
–3 to 18
V
Voltage at BST1, BST2, BST3 referenced to LX pin
–0.3 to 7
V
Voltage at V7V, COMP1, COMP2, COMP3, USB_Vin, USB_Vo
–0.3 to 7
V
Voltage at V3V, RLIM1, RLIM2, RLIM3, EN1,EN2, EN3, SS1, SS2, SS3, FB1, FB2,FB3 ,
–0.3 to 3.6
V
PGOOD, ROSC, PB_IN INT, USB_EN, USB_ILIM
Voltage at GND
–0.3 to 0.3
V
TJ
Operating junction temperature range
–40 to 125
°C
TSTG
Storage temperature range
–55 to 150
°C
(1)
Stresses beyond 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 beyond those indicated under
"recommended operating
conditions
" is not implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
VIN
Input operating voltage
4.5
16
V
TA
Junction temperature
–40
85
°C
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
MIN
MAX
UNIT
Human body model (HBM), PB_IN pin to ground
10000
V
Any other pin
2000
Charge device model (CDM)
500
V
PACKAGE DISSIPATION RATINGS
(1)
TA = 25°C
TA = 55°C
TA = 85°C
PACKAGE
θJA (°C/W)
POWER RATING (W)
RHA
30
3.33
2.3
1.3
(1)
Based on JEDEC 51.5 HIGH K environment measured on a 76.2 x 114 x 0.6-mm board with the following layer arrangement:
(a) Top layer: 2 Oz Cu, 6.7% coverage
(b) Layer 2: 1 Oz Cu, 90% coverage
(c) Layer 3: 1 Oz Cu, 90% coverage
(d) Bottom layer: 2 Oz Cu, 20% coverage
Copyright
2011, Texas Instruments Incorporated
7
Product Folder Link(s): TPS65257
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