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參數(shù)資料
| 型號： | UCD9240PHR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | UCD9240 Digital Point of Load System Controller |
| 中文描述： | UCD9240系列數(shù)字點(diǎn)系統(tǒng)控制器的負(fù)荷 |
| 文件頁數(shù)： | 7/21頁 |
| 文件大?。?/td> | 572K |
| 代理商： | UCD9240PHR |
UCD9240
Digital Point of Load System Controller
SLUS766
– APRIL 2007
www.ti.com
7
ELECTRICAL SPECIFIACTIONS
Recommended operating conditions
SYMBOL
PARAMETER
MIN
NOM
MAX
UNIT
V33D,V33DIO,V33A
Supply voltage during operation
3.0
3.3
3.6
V
T
A
Operating free-air temperature range
-40
125
C
Absolute Maximum Ratings
1
Voltage applied at V33D to DVss
-0.3 V to 3.6 V
Voltage applied at V33A to AVss
-0.3 V to 3.6 V
Voltage applied to any pin (see NOTE)
-0.3 V to V
33D
+ 0.3 V
Storage temperature, T
STG
-40C to 150C
Electrical Characteristics
Supply Current
SYMBOL
PARAMETER
TEST CONDITION
MIN
NOM
MAX
UNIT
I
33a
Supply current
V33A = 3.3V
15
m
Α
I
33dio
Supply current
V33DIO = 3.3V
m
Α
m
Α
m
Α
I
33d
Supply current
V33D = 3.3V
40
I
33d
Supply current
V33D = 3.3V storing configuration
parameters in flash memory
TBD
Regulator Inputs/Outputs
SYMBOL
PARAMETER
TEST CONDITION
MIN
NOM
MAX
UNIT
Vreg BPCap
Bypass Capacitor Voltage
1.8
V
V33
3.3V Linear Regulator
3.25
3.3
3.35
V
V33FB
3.3V linear Reg Feedback
4.0
4.6
V
I33FB
Series pass base drive
Vin = 12V
10
mA
Beta
Series NPN pass device
40
Bias Supply Generator
Two supply voltages, 3.3 and 1.8 V, are required. An internal series pass regulator generates 1.8 V from the 3.3 V
supply. It requires a 0.1 to 1 uF bypass capacitor from BPCap to ground. The 3.3 V can either be supplied from
an external source, or generated from Vin with regulation circuitry built into the UCD9240 that drives an external
series pass NPN transistor. Transistor beta must be at least 40. The typical application circuit shows the base of
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.
NOTE: All voltages referenced to V
SS
.
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| UCD9240RGCR | 功能描述:電壓模式 PWM 控制器 Dig Point of Load System Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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