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TS9002
300mA CMOS LDO with Enable & Power Good
Pin assignment 1. Input 2. Ground 3. Enable 4. Power Good 5. Output
Low Drop Out Voltage 0.4V Enable Shutdown Power Good
General Description
The TS9002 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 TS9002 series is included a precision voltage reference, error correction circuit, a current limited output driver, over temperature shutdown, and a "Power Good" detector, which pulls low when the output is out of regulation. This series are offered in 5-pin SOT-25 package.
Features
Dropout voltage typically 0.4V@Io=300mA (Vo>2.5V) Low power consumption Output voltage +/-2%, +/-3% (1.2V) Internal current limit and thermal shutdown Short circuit current fold-back Power saving shutdown mode Power good output function
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
TS9002xCX5 -40 ~ +85 oC SOT-25 Note: Where x denotes voltage option, available are 1=1.2V A=1.5V K=2.5V, S=3.3V, Contact factory for additional voltage options.
Typical Application Circuit
Block Diagram
TS9002 series
1-1
2004/09 rev. B
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 oC) Vin Vce Io PD ja Tj TSTG +7 Gnd-0.3 ~ Vin+0.3 Pd / (Vin - Vout) 380 260 -40 ~ +125 -65 ~ +150 10 mW
o
V V
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 oC, Io=0.1mA, Cout=2.2uF, Vce2V; Vin >2.7V & Io<150mA for 1.2V output type, unless otherwise specified.)
Parameter
Output Voltage
Conditions
Vin=Vo + 1V Vin=2.7V Vout > 1.5V Vout <1.5V
Min
0.985|Vo| 0.970|Vo| --
Typ
Max
1.015|Vo| 1.030|Vo|
Unit
V
Vout Temperature Coefficient Maximum Output Current Vin=Vo + 1V Vin=2.7V Line Regulation Load Regulation Load Regulation (1.2V output) Dropout Voltage Vout > 1.5V Vout <1.5V
30 ---0.2 1 300 800 1 30 50 450 350 50 20 30
---0.3 1.0 4.0 400 1300 2 50 80 ------
ppm/ oC mA
300 150 --------------
Vo+1V Vin Vo+2V Vin=Vo+1V, 1mAIL300mA Vin=2.7V, 1mAIL150mA Io=300mA, Vout=Vo - 2% Vout2.0V Vout<2.0V
% %
mV
Quiescent Current Quiescent Current
Vin0.4V (shutdown) Vout0.4V, Io=0mA Vout > 1.5V Vout <1.5V Vout > 1.5V Vout <1.5V
uA uA
Output Current Limit
Vout=0V
mA
Power Supply Rejection Ratio
Io=100mA,
At f=1kHz, At f=10kHz,
dB
Output Noise Enable Input Enable Input Logic-Low Voltage Enable Input Logic-High Voltage Enable Input Current
Io=10mA, f=10Hz to 100kHz,
uVrms
Regulation shutdown Regulation enable VIL0.4V VIL2.0V
-2.0 ---
-----
0.4 -0.5 0.1
V V uA
TS9002 series
2-2
2004/09 rev. B
Electrical Characteristics (continued)
Power Good Output under voltage 1.5V Vo(NOM) Vo(NOM) < 1.5V Output over voltage 2.5V Vo(NOM) 5.0V 1.2V Vo(NOM) 2.5V PG leakage current PG voltage rating PG voltage low VPG = 7V Vo in regulation Isink = 0.4mA Isink = 0.1mA Vo >1.5V Vo < 1.5V --115 125 ------------85 75 --1 7 0.4 0.1 % Vo(NOM) % Vo(NOM) uA V V
Detail Description
Description
The TS9002 series of CMOS regulators contain a P-MOS pass transistor, voltage reference, error amplifier, over current protection, thermal shutdown and power good function. The TS9002 series switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over stress. The TS9002 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 oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120 oC.
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 TS9002series 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, during over-temperature, during over-current and output is pulled up.
TS9002 series
3-3
2004/09 rev. B
Typical Electrical Characteristics
TS9002 series
4-4
2004/09 rev. B
SOT-25 Mechanical Drawing
DIM A B C D E F H L
SOT-25 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 2.70 3.00 0.106 0.118 0.25 0.50 0.010 0.020 1.90(typ) 0.075(typ) 0.95(typ) 0.037(typ) 1.50 1.70 0.059 0.067 1.05 1.35 0.041 0.053 2.60 3.00 0.102 0.118 0.60(typ) 0.024(typ)
TS9002 series
5-5
2004/09 rev. B

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