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CS5111YDWF24 Datasheet(PDF) 4 Page - ON Semiconductor |
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CS5111YDWF24 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 16 page CS5111 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (continued) (5.0 V ≤ VIN ≤ 26 V and –40°C ≤ TJ ≤ 150°C, COUT = 100 µF (ESR ≤ 8.0 Ω), CDelay = 0.1 µF, RBIAS = 64.9 kΩ, COSC = 390 pF, CCOMP = 0.1 µF; unless otherwise specified.) Characteristic Unit Max Typ Min Test Conditions Switcher Section (continued) VFB1 Regulation Voltage – 1.206 1.25 1.294 V VFB2 Regulation Voltage – 1.206 1.25 1.294 V VFB1, VFB2 Input Current VFB1 = VFB2 = 5.0 V – – 1.0 µA Oscillator Charge Current COSC = 0 V 35 40 45 µA Oscillator Discharge Current COSC = V40 270 320 370 µA CDelay Charge Current CDelay = 0 V 35 40 45 µA Switcher Max Duty Cycle VSW = 5.0 V with 50 Ω Load, VFB1 = VFB2 = 1.0 V 72 85 95 % Current Sense Amp Gain ISW = 2.3 A – 7.0 – V/V Error Amp DC Gain – – 67 – dB Error Amp Transconductance – – 2700 – µA/V ENABLE Input VIL – 0.8 1.24 – V VIH – – 1.3 2.0 V Hysteresis – – 60 – mV Input Impedance – 10 20 40 k Ω Select Input VIL (Selects VFB1) 4.9 ≤ VLIN ≤ 5.1 0.8 1.25 – V VIH (Selects VFB2) 4.9 ≤ VLIN ≤ 5.1 – 1.25 2.0 V SELECT Pull–Up SELECT = 0 V 10 24 50 k Ω Floating Input Voltage – 3.5 4.5 – V PIN FUNCTION DESCRIPTION PACKAGE PIN # SO–24L PIN SYMBOL FUNCTION 1 VIN Supply voltage. 2, 3 NC No connection. 4 VSW Collector of NPN power switch for switching regulator section. 5, 6, 7, 8, 17, 18, 19, 20 GND Connected to the heat removing leads. 9 VFB1 Feedback input voltage 1 (referenced to 1.25 V). 10 VFB2 Feedback input voltage 2 (referenced to 1.25 V). 11 SELECT Logic level input that selects either VFB1 or VFB2. An open selects VFB2. Connect to GND to select VFB1. 12 COMP Output of the transconductance error amplifier. 13 COSC A capacitor connected to GND sets the switching frequency. Refer to Figure 5. 14 WDI Watchdog input. Active on falling edge. 15 CDelay A capacitor connected to GND sets the Power On Reset and Watchdog time. 16 RESET RESET output. Active low if VLIN is below the regulation limit. If watchdog timeout is reached, a reset pulse train is issued. |
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