TS5201 200mA Low Noise LDO Voltage Regulator with Enable Pin assignment 1. Output 5. Enable 2. ADJ / NC 6. NC 3. Ground 7. NC 4. NC 8. Input Low Power Consumption Low Dropout Voltage 0.275V Fixed and Adjustable Output Enable Shutdown General Description The TS5201 series is an efficient linear voltage regulator with ultra low noise output, very low dropout voltage (typically 17mV at light loads and 165mV at 200mA), and very low power consumption (600uA at 100mA), providing high output current even when the application requires very low dropout voltage. The Chip Enable (CE) includes a CMOS or TTL compatible input allows the output to be turned off to prolong battery life. When shutdown, power consumption drops nearly to zero. The TS5201 series is included a precision voltage reference, error correction circuit, a current limited output driver, over temperature shutdown, revered battery protection and a reference bypass pin to improve its already excellent low-noise performance. The TS5201 series is available in fixed and adjustable output voltage version in SOP-8 package. Features Ordering Information Ultra low noise output. Output current up to 200mA Low dropout voltage Low power consumption “Zero” off-mode current Logic controlled electronic enable Internal current limit and Thermal shutdown protection Part No. TS5201CSxx Operating Temp. o 0 ~ +125 C Package SOP-8 Note: Where xx denotes voltage option, available are 5.0V, 3.3V, 3.0V and 2.5V. Leave blank for adjustable version. Contact factory for additional voltage options. Applications Cellular telephones Palmtops, notebook computers Battery powered equipment Consumer and personal electronics SMPS post regulator and DC to DC modules High-efficiency linear power supplies Typical Application Circuit Fixed Application TS5201 series Adjustable Application 1-6 2005/08 rev. C Absolute Maximum Rating (Note 1) Input Supply Voltage Vin -20~ +20 V Enable Input Voltage Vce -20~ +20 V Power Dissipation (Note 2) PD Internal limited Thermal Resistance Өja 220 Tj 0 ~ +125 o C -65 ~ +150 o C Operating Junction Temperature Range Storage Temperature Range TSTG o Lead Soldering Temperature (260 C) o C/W 5 S Recommend Operating Rating (Note 3) Input Supply Voltage Vin +2.5 ~ +16 V Enable Input Voltage Vce 0 ~ Vin V Electrical Characteristics o Vin=Vo+1V, Io=100uA, Cout=1uF, Vce≥2V, Tj = 25 C, unless otherwise specified. Parameter Conditions Min Typ Max Unit 0.99|Vo| Vout 1.01|Vo| V Output Voltage Vin=Vo + 1V Output Voltage Temp. Coefficient (Note 4) -- 40 -- ppm/ C Line Regulation Vo+1V ≤ Vin ≤ 16V -- 0.005 0.05 %/V Load Regulation (Note 5) 0.1mA ≤ Io ≤ 200mA -- 0.02 0.2 %/V Io=100uA -- 17 50 Io=50mA -- 110 150 Io=100mA -- 140 250 Io=200mA -- 165 275 Vin≤0.4V (shutdown) -- 0.01 1 Vin≤0.18V (shutdown) -- -- 5 Io=100uA -- 80 125 Io=50mA -- 350 600 Io=100mA -- 600 1000 Io=200mA -- 1300 1900 Dropout Voltage (Note 6) Quiescent Current Ground Pin Current (Note 7) Vce≥2V o mV uA uA Output Current Limit Vout=0V -- 300 500 mA Power Supply Rejection Ratio At f=100Hz, Io=100uA, -- 75 -- dB -- 0.05 -- %/W -- 260 -- nV -- -- 0.4 V 2.0 -- -- V VIL≤ 0.4V -- 0.01 -1 VIH≥ 2.0V -- 5 20 Thermal Regulation (Note 8) Output Noise Io=50mA, Cout=2.2uF, 470pF from bypass to Ground Enable function Enable Input Logic-Low Voltage Regulation shutdown Enable Input Logic-High Voltage Regulation enable Enable Input Current TS5201 series 2-6 2005/08 rev. C uA Electrical Characteristics (continued) Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The maximum allowable power dissipation at any Ta is Pd(max) = [ Tj(max) - Ta] + Өja. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. Note 3: The device is not guaranteed to function outside its operating rating. Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 1mA to 200mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 7: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 8: Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 200mA load pulse at Vin=16V for t=10mS. Block Diagrams * Fixed Voltage * Adjustable Voltage Vout = Vref x (1+R2/R1) TS5201 series 3-6 2005/08 rev. C Application Information Enable Input Most of tantalum or aluminum electrolytic capacitors TS5201 series feature an active-high (>2V) enable (EN) are adequate; film types will work. Since many input that allows ON/OFF control of the regulator. aluminum electrolytic have electrolytes that freeze at Current drain reduces to “zero” when the device is o about –30 C, solid tantalums are recommended for shutdown, with only micro-amperes of leakage current. operation below –25 C. At lower values of output The EN is compatible with CMOS logic interfacing. EN current, less output capacitance is required for output may be directly tied to Vin and pulled up to the o stability. The capacitor can be reduced to 0.47uF for maximum supply voltage. current below 10mA or 0.33uF for currents below 1mA. Input Capacitor Requirement No Load Stability An input capacitor of 1uF or greater is recommended The TS5201 series iwill remain stable and in regulation when the device is more than 10” away from the bulk with no load, unlike many other voltage regulators. AC supply capacitance or when the supply is a battery. This is especially important in CMOS RAM keep alive Reference Bypass Capacitor applications. Bypass is connected to the internal voltage reference. A Adjustable Regulator Design 470uF capacitor (Cbypass) connected from Bypass to The adjustable regulator versions can be adjusted to a Ground quiets this reference, providing a significant specific output voltage by using two external resistors reduction in output noise. Cbypass reduces the to programming the output voltage anywhere between regulator phase margin; when using Cbypass, output 1.25 and the 16V maximum operating rating of the capacitors of 2.2uF or greater are generally required to family. maintain stability. Two resistors are used. Resistors can be quite large The star up speed of the TS5201 is inversely up to 470kΩ, because of the very high input proportional to the size of the reference bypass impedance and low bias current of the sense capacitor. Applications requiring a slow ramp up of comparator, the resistor values are calculated by: output voltage should consider larger values of Cbypass. Likewise, if rapid turn on is necessary, Vout = 1.242V * (R2 / R1 + 1) consider omitting Cbypass. If output noise is not a major concern, omitted Cbypass and leave Bypass open. Output Capacitor Requirement The TS5201 series requires an output capacitor to maintain stability and improve transient response is necessary. The value of this capacitor is dependent upon whether a reference bypass capacitor is used. 1uF minimum is recommended when Cbypass is not used. 2.2uF minimum is recommended when Cbypass is 470uF. Larger values improve the regulator’s transient response. The output capacitor value may be increased without limit. The output capacitor should have an ESR (effective series resistance) less than 5Ω and a resonant frequency above 1MHz. Ultra low ESR capacitors can cause a low amplitude oscillation on the output and/or under damped transient response. TS5201 series 4-6 A capacitor from Adj to Ground provides greatly improved noise performance. Dual Supply Operation When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. 2005/08 rev. C Application Information (continues) Thermal Characteristics Noise Reduction Capacitors TS5201 series is designed to provide 200mA of On adjustable devices, a capacitor from ADJ to GND continuous current in a very small package. Maximum will decrease high frequency noise on the output. See power dissipation can be calculated based on the following figure output current and the voltage drop across the part. To determine the maximum power dissipation of the package, use the junction-ambient thermal resistance of the device and the following basic equation: Pd(max) = [ Tj(max) – Ta ] /Θja Tj(max) is the maximum junction temperature of the o die(125 C), and Ta is the ambient operating temperature. Θja is layout dependent, the actual power dissipation of the regulator circuit can be determined using the equation: Pd = ( Vin – Vout ) * Iout + Vin * Ignd Substituting Pd(max) for Pd and solving for the operating conditions that are critical to the application will give the maximum operating conditions for the regulator circuit. For example, when operating the TS5201CX533 at room temperature with a minimum footprint layout, the maximum input voltage for a set output current can be determined as follows: o o o Pd(max) = (125 C – 25 C) / 220 C/W Minimum Load The TS5201 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Dual-Supply Systems When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. Pd(max) = 455mW The junction to ambient thermal resistance for the o minimum footprint is 220 C/W, the maximum power dissipation must not be exceeded for proper operation. Using the output voltage of 3.3V and an output current of 200mA, the maximum input voltage can be determined. Formt eh electrical characteristics table, the maximum ground current for 200mA output current is 2.5mA. 445mW = ( Vin – 3.3V ) * 200mA + Vin * 2.5mA 445mW = Vin * 200mA – 3.3 * 200mA + Vin * 2.5mA 445mW = Vin * 200mA – 495mW + Vin * 2.5mA 950mW = Vin * 152.5mA Vin(max) = 6.23v Therefore, a 3.3V application at 200mA of output current can accept a maximum input voltage of 6.23V in a SOT-25 package. TS5201 series 5-6 2005/08 rev. C SOP-8 Mechanical Drawing SOP-8 DIMENSION DIM MILLIMETERS MIN MAX MIN MAX A 4.80 5.00 0.189 0.196 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G K TS5201 series 6-6 INCHES 1.27 (typ) 0.10 o 0.05 (typ) 0.25 7 o 0.004 0 o 0.009 0 P 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019 2005/08 rev. C 7 o M