PSRS-78xxLF Mainzer Straße 151–153 D-55299 Nackenheim Tel. +49 6135 7026-0 Fax: +49 6135 931070 www.peak-electronics.de [email protected] PME02-SERIES Rev.09-2009 500 mA Switching Regulator Wide Input SMD Plastic Package Non-Isolated & Regulated Adjustable Output Voltage SC Prot. / Thermal Shutdown Remote ON/OFF Control The PME02-500mA Series with high efficiency switching regulators are ideally supply for space constrained mobile applications. They are no need for any heat sinks, even if operate at +85°C. The additional features include remote ON/OFF control and adjustable output voltage. Super low ripple and noise of typically only 10mV and a shutdown input current of typically only 15uA. All specifications typical at Ta=25°C, nominal input voltage and full load unless otherwise specified Input Specifications Voltage Range Wide Input (See Table) Output Specifications Voltage Accuracy (100% load) Short Circuit Protection Line Regulation Load Regulation (10% - 100% load) Ripple and Noise (20Mhz bandwidth) Output Current Limit Temperature Coefficient ± 2%, typ. Continuous (Hiccup / Automatic Recovery) ± 0.2%, typ. ± 0.3%, typ. 25 mV pk-pk, max. 1.8 A ± 0.02% / °C General Specifications Dynamic Load Stability (100% <-> 10% load) Quiescent current (nom. Input, 3.3 and 5 Vout) Thermal Shutdown Capacitance Load ON/OFF control current ON: open or 1.5<Vc≤6 OFF: GND or 0V<Vc<1V ± 30 mV, typ. 15 mA, typ 160°C 1000 uF, max. 2 uA, typ. Shutdown Input Current ON/OFF Shutdown Threshold Voltage Reliability Calculated MTBF (MIL-HDBK-217F) 30 uA, max. 1.1 V, min / 1.25 V, typ. / 1.4 V, max. ≥ 2 Mhrs Physical Specifications Case Material Weight Non Conductive Black Plastic (UL94V-0 rated) ~ 2.3 g, typ. Environment Specifications Operating Temperature Maximum Case Temperature Storage Temperature Cooling -40 to +85°C (ambient) 100°C -55 to +125°C Free Air Convection (10mm distance required) PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case Specification can change without a notice – We accept no liability for any inaccuracy or printing errors. Page 1/4 Selection Guide C) C) ( VD (VD ) e e C g g D A) an (% ) an al ( V . (m ax. eR en st R x m g g u m r j a a a o t d t y l l m A N ienc t Vo t Vo pu t pu t re n t In p u In p u O ut O ut Cur E ffi c (V om . Order # PSRS-783R3LF PSRS-7805LF PSRS-7812LF PSRS-7815LF 12 12 24 24 DC) 4.5 - 28 6.0 - 28 14 - 28 17 - 28 3.3 5 12 15 1.8 - 5.5 2.5 - 8.0 4.5 - 13.5 4.5 - 15.5 500 500 500 500 90 94 95 96 If you need other specifications, please enquire. Notes: PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case Specification can change without a notice – We accept no liability for any inaccuracy or printing errors. Page 2/4 11.82 (0.47) 8.50 (0.34) Package / Pinning / Derating PIN CONNECTIONS # Switching Reg. 1 +Vin 5 +Vout 6 Vadj 7 GND 9 GND 10 ON/OFF others Omitted OUTPUT POWER TEMPERATURE DERATING GRAPH 100% 75% 50% 25% 71 -40 -20 0 20 40 60 85 80 100 AMBIENT TEMPERATURE (°C) 250 P eak.Temp 240 C 10 S ec Max External Capacitor Table 220 C Temperature ( C) 200 90 Sec Max (>2 2 0 C) Part C1 C2 Number (ceramic cap.) (ceramic cap.) PSRS-783R3LF 10uF/50V 22uF/16V PSRS-7805LF 10uF/50V 22uF/16V PSRS-7812LF 10uF/50V 10uF/25V PSRS-7815LF 10uF/50V 10uF/25V 150 100 50 0 Time (s ec .) Vin 1 C1 10 7 ,9 *L 5 PSRS-7805LF K7805T-500 6 R1 106K/50V 226K/25V ON/OF F GND C2 C5 470pF Vout C3 100µ F R2 GND 1. C1,C2: Choose a ceramic type capacitors; C3 is require ,for best performance, use a 100µF or more capacitor please. 2. C1,C2 are require and should be placed close to the pins of the converter, with shortest possible traces. 3. No parallel connection or plug and play. *L: To reduce output ripple, it is recommended to add a LC filter to output port. Recommended parameter: 10µH ~ 47µH. PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case Specification can change without a notice – We accept no liability for any inaccuracy or printing errors. Page 3/4 App Notes The ON/OFF pin provides several features for adjusting and sequencing the power supply, a user has the flexibility of using the ON/OFF pin as: 1) A digital on/off control by pulling down the ON/OFF pin with an open-drain transistor. ON/OFF 2) Line UVLO. If desired to achieve a UVLO voltage, an resistor divider from Vin to ON/OFF to GND can be used to disable the converter until a higher input voltage is achieved. For example, it is not useful for a converter with 12V output to start up with a 12V input voltage, as the output cannot teach regulation. To enable the converter when the input voltage reaches 14V, a 51kΩ/5kΩ resistor divider from Vin to GND can be connected to the ON/OFF pin. Both the precision 1.25V threshold and 150mV hysteresis are multiplied by the resistor ratio, providing a proportional 12% hysteresis for any startup threshold. So, the turn off threshold would be between 12.3V to 15.7V. DC/DC Converter 1 51KΩ C1 10 7,9 +Vout 5 6 100µ F 470pF 5KΩ Load Vin GND 2) Power supply sequencing. By connecting a small capacitor from ON/OFF to GND, the 2µA current source and 1.25V threshold can provide a stable and predictable delay between start-up of multiple power supplies. For example, a start-up delay of roughly 64mS is provided using 100nF, and roughly 136mS by using 200nF. C1 10 7,9 6 C5 470pF GND D C/D C 1 Converter 5 Vin +Vout 100µ F Vout (nominal) PSRS-783R3LF 6 470pF 100µ F 200nF Delay time: 64mS Part # 7,9 C5 GND 100nF 10 C1 +Vout Load D C/DC Converter 5 1 Load Vin Delay time: 136mS Vout adjust up R2 (kOhm) 75 .10 − 10 * Vout Vout − 3.3 91.52 − 10 * Vout Vout − 5 Vout adjust down R1 (kOhm) 61 * Vout − 75 .10 3.3 − Vout 61 * Vout − 91.52 5 − Vout 3.3 = PSRS-7805LF 5 = PSRS-7812LF 12 = 287 .02 − 20 * Vout Vout − 12 = 71 * Vout − 287 .02 12 − Vout PSRS-7815LF 15 = 269 .37 − 15 * Vout Vout − 15 = 66 * Vout − 269 .37 15 − Vout = = The R1, R2 which choose from the table 1 equation are used to set the output voltage. Select the R1 or R2 resistor to provide the desired regulation voltage. R1 is used to set the output voltage to lower, R2 is used to set the output voltage to higher. If no need to adjust the output voltage, please connect a ceramic capacitor to GND with 470pF typical value. Insure the output voltage is in the adjust range. PME02-Series – PSRS-78xxLF – Switching Regulator – SMD – Plastic Case Specification can change without a notice – We accept no liability for any inaccuracy or printing errors. Page 4/4