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CS5112YDWFR24 Datasheet(PDF) 4 Page - ON Semiconductor |
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CS5112YDWFR24 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 13 page CS5112 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (5.0 V ≤ VIN ≤ 26 V and −40°C ≤ TJ ≤ 150°C, COUT = 100 mF (ESR ≤ 8.0 W), CDelay = 0.1 mF, RBIAS = 64.9 kW, COSC = 390 pF, CCOMP = 0.1 mF; unless otherwise specified.) Characteristic Unit Max Typ Min Test Conditions Switcher Section (continued) Switcher Max Duty Cycle VSW = 5.0 V with 50 W 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 − mA/V ENABLE Input VIL − 0.8 1.24 − V VIH − − 1.3 2.0 V Hysteresis − − 60 − mV Input Impedance − 10 20 40 k W 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 Pullup SELECT = 0 V 10 24 50 k W Floating Input Voltage − 3.5 4.5 − V PIN FUNCTION DESCRIPTION PACKAGE PIN # SOIC−24 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. 21 IBIAS A resistor connected to GND sets internal bias currents as well as the COSC and CDelay charge currents. 22 VLIN Regulated 5.0 V output from the linear regulator section. 23 VREG Input voltage to the linear regulator and the internal supply circuitry. 24 ENABLE Logic level input to shut down the switching regulator. |
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