XL217

XL217 SOP8 / XT217 TO92 Datasheet - production data Features Description • Outuput voltage range: 1.2 to 37 V The XL217 are monolithic integrated circuits in SO-8 and TO-92 packages intended for use as positive adjustable voltage regulators. They are designed to supply up to 100 mA of load current with an output voltage adjustable over a 1.2 to 37 V range.The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. • Outuput current in excess of 100 mA • Output current up to 100 mA • Line regulation typ. 0.01% • Load regulation typ. 0.1% • Thermal overload protection • Short-circuit protection • Output transition safe area compensation • Floating operation for high voltage applications Table 1. Device summary Order codes SO-8 (tape and reel) TO-92 (Bag) XL217 XL217 1 XT217 Diagram Figure 1. Schematic diagram 1 XL217 SOP8 / XT217 TO92 2 Pin configuration Figure 2. Pin connections (top view for SO-8, bottom view for TO-92) PIN 1 = ADJUST PIN 2 = IN PIN 3 = OUT SO-8 3 TO-92 Maximum ratings Table 2. Absolute maximum ratings Symbol VI-VO Parameter Input-output differential voltage PD Power dissipation TOP Operating junction temperature range TSTG Storage temperature range Value Unit 40 V Internally limited mW for XL217 -40 to 125 for XT217 0 to 125 °C -55 to 150 °C Figure 3. Test circuit ,Q 2XW 217 $GM 23 2 XL217 SOP8 / XT217 TO92 4 Electrical characteristics (Refer to the test circuits, TJ = - 40 to 125°C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified) Table 3. Electrical characteristics of XL217 Symbol DVO Parameter Line regulation Test conditions VI - VO = 3 to 40 V, IL 20 mA VO ≤ 5 V, IO = 5 to 100 mA DVO TJ = 25°C Unit 0.01 0.02 0.02 0.05 5 15 20 50 0.1 0.3 0.3 1 50 100 µA 0.2 5 µA 1.25 1.3 V mV TJ = 25°C Adjustment pin current DIADJ Adjustment pin current VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW VREF Reference voltage VI - VO = 3 to 40 V, IO = 10 to 500 mA Pd < 625 mW % 1.2 Output voltage temperature stability IO(min) Minimum load current IO(max) Maximum output current SVR Max. %/V TJ = 25°C IADJ eN Typ. Load regulation VO ≥ 5 V, IO = 5 to 100 mA DVO/VO Min. 0.7 VI - VO = 40 V 3.5 VI - VO = 3 to 13 V 100 5 mA 200 mA VI - VO = 40 V 50 Output noise voltage B = 10 Hz to 10 KHz, TJ = 25°C Supply voltage rejection TJ = 25°C f = 120 Hz (1) % 0.003 CADJ = 0 CADJ = 10 µF 1. CADJ is connected between adjust pin and ground. 3 % 65 dB 66 80 XL217 SOP8 / XT217 TO92 (Refer to the test circuits, TJ = 0 to 125°C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified) Table 4. Electrical characteristics of XL217 Symbol DVO Parameter Line regulation Test conditions VI - VO = 3 to 40 V, IL < 20 mA VO ≤ 5 V, IO = 5 to 100 mA DVO Min. TJ = 25°C 0.01 0.04 0.02 0.07 5 25 20 70 0.1 0.5 0.3 1.5 50 100 µA 0.2 5 µA 1.25 1.3 V mV TJ = 25°C Adjustment pin current DIADJ Adjustment pin current VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW VREF Reference voltage VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW % 1.2 Output voltage temperature stability IO(min) Minimum load current IO(max) Maximum output current SVR Unit %/V TJ = 25°C IADJ eN Max. Load regulation VO ≥ 5 V, IO = 5 to 100 mA DVO/VO Typ. 0.7 VI - VO = 40 V 3.5 VI - VO = 3 to 13 V 100 % 5 mA 200 mA VI - VO = 40 V 50 Output noise voltage B = 10 Hz to 10 KHz, TJ = 25°C Supply voltage rejection (1) TJ = 25°C f = 120 Hz 0.003 CADJ = 0 CADJ = 10 µF % 65 dB 66 80 1. CADJ is connected between adjust pin and ground. 5 Typical performance Figure 4. Current limit Figure 5. Minimum operating current 23 4 XL217 SOP8 / XT217 TO92 6 Application information The XL217 provides an internal reference voltage of 1.25 V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider (see Figure 6.), giving an output voltage VO of: VO = VREF (1 + R2/R1) + IADJ R2 The device was designed to minimize the term IADJ (100 µA max) and to maintain it very constant with line and load changes. Usually, the error term IADJ × R2 can be neglected. To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. Since the XL217 is a floating regulator and "sees" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can be regulated as regulator as the maximum input-to-output differential is not exceeded. Furthermore, programmable regulators are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. In order to optimize the load regulation, the current set resistor R1 (see Figure 6.) should be tied as close as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to provide remote ground sensing. 23 5 XL217 SOP8 / XT217 TO92 7 Application circuits Figure 6. Basic adjustable regulator 217 "EK Figure 7. Voltage regulator with protection diodes 217 "EK Figure 8. Slow turn-on 15 V regulator 217 $GM 6 XL217 SOP8 / XT217 TO92 Figure 9. Current regulator 217 ,2 95()5,$'- 95 Figure 10. 5 V Electronic shut-down regulator 217 $GM Figure 11. Digitally selected outputs 217 $GM 5 VHWVPD[LPXP92 23 7 XL217 SOP8 / XT217 TO92 23 87 XL217 SOP8 / XT217 TO92 23 89