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參數(shù)資料
| 型號(hào)： | TS9004CX6 |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | 300mA CMOS LDO Adjustable Voltage with Enable & Power Good |
| 中文描述： | 300mA的CMOS低壓可調(diào)電壓與啟用 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大小： | 125K |
| 代理商： | TS9004CX6 |
TS9004
3-3
2003/12 rev. B
Electrical Characteristics
(Ta = 25
o
C, Vin= Vin(min), Vce
≥
2V, unless otherwise specified.)
Power Good
PG Low Threshold
% of Vo (PG ON)
89.5
--
85
PG High Threshold
% of Vo (PG OFF)
--
--
96.5
%
PG leakage current
V
PG
= 7V
--
--
1
uA
PG voltage rating
Vo in regulation
--
--
7
V
PG voltage low
Isink = 0.4mA
--
--
0.4
V
Vin= 5V
--
8
--
Delay Time to PG (note 2)
Vin= 3V
--
4
--
mS
Note 1: Vin(min) = Vout + Vdropout
Note 2: Guaranteed by design, not 100% tested.
Note 3: Short circuit current and current limit value will be increased as input voltage is larger than Vin(min)
Detail Description
Description
The TS9004 series of CMOS regulators contain a P-MOS pass transistor, voltage reference, error amplifier, over
current protection, thermal shutdown and power good function.
The TS9004 series switches from voltage mode to current mode when the load exceeds the rated output current. This
prevents over stress. The TS9004 also incorporates current fold-back to reduce power dissipation when the output is
short circuit. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%.
Full current is restored when the voltage exceeds 0.8V.
The internal P-channel pass transistor receives data from the error amplifier, over current shutdown, short output
protection and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to
a precision reference. Over current and thermal shutdown circuits become active when the junction temperature
exceeds 150
o
C, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120
o
C.
Enable
The Chip Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all
internal circuits are powered down. In this state, the quiescent current is less than 1uA. This pin behaves much like an
electronic switch.
External Capacitor
The TS9004 series is stable with an output capacitor to ground of 2.2uF or greater. It can keep stable even with
higher or poor ESR capacitors. A second capacitor is recommended between the input and ground to stabilize Vin.
The input capacitor should be larger than 0.1uF to have a beneficial effect. All capacitors should be placed in close
proximity to the pins. A “quiet” ground termination is desirable.
Power Good
The TS9002 includes the Power Good feature. When the output is not within = +/-15% of the specified voltage, it pulls
low. This can occur on other condition:
–
Input voltage too low
–
Temperature during over
–
Current during over
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