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TS9001
300mA CMOS Low Dropout Voltage Regulator with Enable
Pin assignment 1. Input 2. Ground 3. Enable 4. Bypass 5. Output
Low Drop Out Voltage 0.4V Enable Shutdown
General Description
The TS9011 series is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30uA typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications. The Chip Enable (CE) includes a CMOS or TTL compatible input allows the output to be turned off to prolong battery life. The TS9001 series is included a precision voltage reference, error correction circuit, a current limited output driver, over temperature shutdown, and a reference bypass pin to improve its already excellent low-noise performance. This series are offered in 5-pin SOT-25 package.
Features
Dropout voltage typically 0.4V@Io=300mA (Vo>2.5V) Output current up to 300mA Low power consumption Output voltage +/-2% Internal current limit and thermal shutdown Thermal shutdown protection
Ordering Information
Part No. Operating Temp. (Ambient) Package
Applications
Palmtops Video recorders Battery powered equipment PC peripherals High-efficiency linear power supplies Digital signal camera
TS9001xCX5 -40 ~ +85 oC SOT-25 Note: Where x denotes voltage option, available are A=1.5V D=1.8V, K=2.5V, P=3.0V, S=3.3V, Contact factory for additional voltage options.
Typical Application Circuit
Block Diagram
TS9001 series
1-5
2003/12 rev. A
Absolute Maximum Rating
Input Supply Voltage Enable Input Voltage Output Current Power Dissipation Thermal Resistance Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature (260 C)
o
Vin Vce Io PD ja Tj TSTG
+7 Gnd-0.3 ~ Vin+0.3 Pd / (Vin - Vout) 380 260 -40 ~ +125 -65 ~ +150 5
V V
mW
o
C/W
o o
C C
S
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
Electrical Characteristics
Ta = 25 C, Io=1mA, Cout=2.2uF, Vce2V, unless otherwise specified.
o
Parameter
Output Voltage Output Voltage Temperature Coefficient Maximum Output Current Line Regulation Load Regulation
Conditions
Vin=Vo + 1V
Min
0.985|Vo| --
Typ
50
Max
1.015|Vo| --
Unit
V ppm/ C
o
Vin=Vo+1V, Vo+1V Vin 7V Vin=Vo+1V, 1mAIL300mA Vin=Vo+1V, 1mAIL200mA Vout<2.5V Vout2.5V
300 ---
--0.2
-0.3 1.0
mA %/V
%/V -0.2 1.0
Dropout Voltage
Io=300mA, Vout=Vo - 2% Io=200mA, Vout=Vo - 2%
Vout2.5V
--
300
--
mV
Vout<2.5V
--
800
1000
Quiescent Current Ground Pin Current Output Current Limit Power Supply Rejection Ratio Power Supply Rejection Ratio
Vin0.4V (shutdown) Io=1mA to 300mA Vout=0V At f=1kHz, Io=100mA, At f=1kHz, Io=100mA, Cbypass=0.01uF
------
2 30 450 60 75
3 50 ----
uA uA mA dB dB
Output Noise
Io=10mA, f=10Hz to 100kHz, 10pF from bypass to Ground
--
30
--
uVrms
Enable Input Enable Input Logic-Low Voltage Enable Input Logic-High Voltage Enable Input Current Regulation shutdown Regulation enable VIL0.4V VIL2.0V -2.0 ----0.01 1 0.4 -1 5 V V uA
TS9001 series
2-5
2003/12 rev. A
Detail Description
Description
The TS9001 series of CMOS regulators contain a P-MOS pass transistor, voltage reference, error amplifier, over current protection, thermal shutdown and short circuit protection. The TS9001 series switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over stress. The TS9000 also incorporates current fold-back to reduce power dissipation when the output is short circuit. This feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.95V. 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 oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is o restored when the junction temperature drops below 120 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 5uA. This pin behaves much like an electronic switch.
External Capacitor
The TS9001 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. A third capacitor can be connected between the Bypass pin and Ground. This capacitor can be a low cost polyester film variety between the value of 1~10nF. A larger capacitor improves the AC ripple rejection, but also makes the output come up slowly. This "soft" turn-on is desirable in some applications to limit turn-on surges. All capacitors should be placed in close proximity to the pins. A "quiet" ground termination is desirable.
TS9001 series
3-5
2003/12 rev. A
Application Examples
Standard Circuit
Typical Application Circuit 1
Typical Application Circuit 2
TS9001 series
4-5
2003/12 rev. A
SOT-25 Mechanical Drawing
SOT-23 DIMENSION DIM A B C D E F H L MILLIMETERS MIN MAX 2.70 3.00 0.25 0.50 1.90(typ) 0.95(typ) 1.50 1.05 2.60 1.70 1.35 3.00 INCHES MIN MAX 0.106 0.118 0.010 0.020 0.075(typ) 0.037(typ) 0.059 0.041 0.102 0.067 0.053 0.118
0.60(typ)
0.024(typ)
TS9001 series
5-5
2003/12 rev. A

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