TS9002_07

TS9002 Series 300mA CMOS LDO with Enable & Power Good SOT-25 Pin Definition: 1. Input 2. Ground 3. Enable 4 . P o w e r Go o d 5. Output General Description The TS9002 series is a positive voltage linear regulator developed utilizing C MOS 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 inc luded a precision voltage reference, error correction circuit, a current limited output driver , over temperature shutdown, and a “ Power Good” detec tor, 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 pow er consumption Output voltage ±2%, ±3% (1.2V) Inter nal current limit and ther mal shutdown Shor t circuit current fold-back Power saving shutdown mode Power good output func tion Ordering Information Part No. TS9002xC X5 RF 1=1.2V A=1.5V K=2.5V S=3.3V Contac t factory for additional voltage options . Package SOT-25 Packi ng 3Kpcs / 7” Reel Note: W here x denotes voltage option, available ar e Applications ● ● ● ● ● ● Palmtops Video recorders Battery powered equipment PC peripherals High-efficiency linear power supplies Digital signal camera Block Diagram Typical Application Circuit VIN EN off on PG VOUT COUT 2.2uF EN ( Pin 3) may be connec ted direc tly to VI N ( Pin1) Connected to output for Power Good or left floating Basic operation: CBYP=not used, COUT>1uF 1/5 Version: A07 TS9002 Series 300mA CMOS LDO with Enable & Power Good Absolute Maximum Rating Parameter Input Supply Voltage Enable Input Voltage Output Current Power Dissipation Thermal R esistance Operating Junction Temperature R ange Storage Temperature Range Lead Soldering Temperature (260 °C) Symbol VIN Vce IO PD Өja Tj TSTG Limit +7 Gnd-0.3 ~ Vin+0.3 Pd / (Vin – Vout) 380 260 - 4 0 ~ +1 2 5 - 6 5 ~ +1 5 0 10 Unit V V mW °C /W °C °C S Notes: Stress above the listed absolute rating may cause per manent damage to the device. Detail Description The TS9002 family of CMOS regulators contain a PMOS pass transistor , voltage reference, error amplifier, ov ercurrent protec tion, ther mal shutdown, and power good function. The P-channel pass transistor receives data from the error amplifier , over-current shutdown, and ther mal protection circuits. During nor mal operation, the error amplifier compares the output voltage to a precis io n reference. Over-current o and Ther mal shutdown circuits become ac tive when the junction temperature exceeds 150 C , or the current exceeds 300mA. During ther mal shutdown, the output voltage remains low. Nor mal operation is restored when the junction o temperature drops below 120 C . The TS9002 switches from voltage mode to current mode when the load exceeds the r ated output curr ent. This prevents over-stress. The TS9002 also incorporates c urrent foldback to r educe power dissipation when the output is short circuit. This feature becomes ac tive when the output drops below 0.8volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 v olts. External Capacitors The TS9002 is stable w ith an output capacitor to ground of 2.2mF or greater . Ceramic capacitors have the low est ESR, and will offer the bes t AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR , resulting in the poorest AC r esponse. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1mF ceramic capacitor with a 10mF Aluminum Electrolytic . The benefit is low ESR, high capac itance, and low overall cos t. A second capacitor is recommended between the input and gr ound to stabilize Vin. The input capacitor should be at least 0.1mF to have a beneficial effec t. All capacitors should be placed in close proximity to the pins . A "Quiet" ground ter mination is desirable. This can be achieved w ith a "Star" connection Enable The Enable pin nor mally floats high. When actively , pulled low , the PMOS pass tr ansistor shuts off, and all internal circuits are pow ered down. In this state, the quiescent current is less than 1mA. This pin behaves much like an electronic switch. Power Good The TS9002 includes the Power Good feature. When the output is not within? 5% of the spec ified voltage, it pulls low. This can occur under the following conditions: (1) Input Voltage too low. ( 2) During Over-Temperature. (3) D uring Over-Current (4) If output is pulled up. (Note: PG pin is an open-drain output) 2/5 Version: A07 TS9002 Series 300mA CMOS LDO with Enable & Power Good Electrical Characteristics (Ta = 25°C, unless otherwise noted) Parameter Input Voltage Output Voltage Accuracy Dropout Voltage Output Current Current Limit Shor t Circuit Current Quiescent Current Ground Pin C urrent Symbol VIN VO VDROPOUT IO ILIM ISC IQ IGND IO=1mA Test Conditi on Mi n Note 1 -1.5 ---300 300 ----0.2 -0.15 -0.1 -0.4 -1 ---- Ty p ------450 150 30 35 --0.02 0.2 0.2 150 30 30 60 50 20 30 ----0.5 -------- Max 7 1.5 1300 400 300 --300 50 -0.2 0.15 0.1 0.4 1 -------Vin 0.4 0.1 0.5 1 0.4 85 75 --1 7 0 .4 Units V % mV mA mA mA uA uA IO=300mA VO=VO(NOM) -2.0% VO >1.2V VO >1.2V VO