cs5157h ON Semiconductor, cs5157h Datasheet
cs5157h
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cs5157h Summary of contents
Page 1
... It is designed to provide unprecedented transient response for today’s demanding high−density, high−speed logic. The regulator operates using a proprietary control method, which allows a 100 ns response time to load transients. The CS5157H is designed to operate over a 4.25−20 V range (V ) using power the IC and 5 the main supply for conversion ...
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... CC1 V CC2 SS COMP OFF V FFB V − V ID0 ID4 V GATE(H) V GATE(L) LGND PGND CS5157H 5 GATE(H) V GATE(L) PGND FFB 100 pF Rating Reflow: (SMD styles only) (Note 1) Max Operating Voltage 16 V/−0 V/−0.3 V 6.0 V/−0.3 V 6.0 V/−0.3 V 6.0 V/−0.3 V 6.0 V/− ...
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... GATE(H) High Threshold PWM Comparator Transient Response V FFB V CC1 V Bias Current V FFB FFB 2. Guaranteed by design, not 100% tested in production. CS5157H < +70°C; 0°C < T < +125°C; 8.0 V < CC1 and CV = 1.0 nF 330 pF; C GATE(H) OFF Test Conditions = 0 V < 4.0 V; (Note 2) COMP = 1.5 V ...
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... CS5157H < +70°C; 0°C < T < +125°C; 8.0 V < and CV = 1.0 nF 330 pF; C GATE(H) OFF Test Conditions ID0, ID1 ID2 ID3 ID4 ID0, ID1 ...
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... Error amplifier compensation pin. A capacitor to ground should be provided externally to compensate the amplifier Error amplifier DC feedback input. This is the master voltage feedback which sets the output FB voltage. This pin can be connected directly to the output or a remote sense trace. CS5157H < +70°C; 0°C < T < +125°C; 8.0 V < CC1 and CV = 1.0 nF ...
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... This control scheme differs from traditional techniques such as voltage mode, which generates an artificial ramp, and current mode, which generates a ramp from inductor current. CS5157H 5 Low − Comparator ...
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... 100 mV steps, the second is 2 control 1. 2. steps, depending on the digital input code. If all five bits are left open, the CS5157H enters adjust mode. In adjust mode, the designer can choose any output voltage by using resistor divider feedback to the V and V pins traditional controllers ...
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... Trace 3− Input (V and V ) (5.0 V/div.) CC1 CC2 Trace 4− 5.0 V Input (1.0 V/div.) Figure 4. CS5157H Demonstration Board Startup in Response to Increasing 12 V and 5.0 V Input Voltages. Extended Off Time is Followed by Normal Off Time Operation when Output Voltage Achieves Regulation to the Error Amplifier Output. M 2.50 ms Trace 1− ...
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... Trace 1− Regulator Output Voltage (100 mV/div.) Trace 2− Inductor Switching Node (5.0 V/div.) Trace 3− Output Current (13 to 0,5 Amps) (10 A/div.) Figure 11. CS5157H Demonstration Board Response Load Turn Off (Output Set for 2.8 V). V Topology Immediately Connects Inductor to Ground, Providing 0% Duty Cycle. Regulation is Achieved in ...
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... Trace 4− 5.0 V Supply Voltage (2.0 V/div.) Trace 3− Soft−Start Timing Capacitor (1.0 V/div.) Trace 2− Inductor Switching Node (2.0 V/div.) Figure 12. CS5157H Demonstration Board Hiccup Mode Short Circuit Protection. Gate Pulses are Delivered While the Soft−Start Capacitor Charges, and Cease During Discharge CS5157H < ...
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... Figure 18. CS5157H Demonstration Board During Power Up. Power Good Signal is Activated when SS Selecting External Components CS5157H The CS5157H can be used with a wide range of external FFB power components to optimize the cost and performance of a particular design. The following information can be used as general guidelines to assist in their selection. ...
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... A Schottky diode may be placed in parallel with the synchronous MOSFET to conduct the inductor current upon turn off of the switching MOSFET to improve efficiency. The CS5157H reference circuit does not use this device due to it’s excellent design. Instead, the body diode of the synchronous MOSFET is utilized to reduce cost and conducts the inductor current. For a design operating at 200 kHz or so, the low non− ...
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... Figure 20. Filter Components 2 1200 pF × 3.0/16 V Figure 21. Input Filter CS5157H Layout Guidelines 1. Place 12 V filter capacitor next to the IC and connect capacitor ground to pin 11 (PGND). 2. Connect pin 11 (PGND) with a separate trace to the ground terminals of the 5.0 V input capacitors. 3. Place fast feedback filter capacitor next to pin 8 (V and connect it’ ...
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... Figure 23. Additional Application Diagram, 5 3.3 V/10 A Converter CC1 V ID0 V ID1 V ID2 V ID3 CS5157H V ID4 C OFF 330 pF SS 0.1 mF COMP LGND 0.33 mF Figure 24. Additional Application Diagram, 3 2.5 V/7.0 A Converter with 12 V Bias CS5157H 1.0 mF 1.0 mF Si4410DY V CC2 V GATE(H) V GATE(L) PGND FFB LGND 100 pF CC2 Si9410 V GATE( GATE(L) PGND 3 ...
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... W 1 CC1 V ID0 V ID1 V ID2 V ID3 CS5157H V ID4 C OFF 330 pF SS 0.1 mF COMP LGND 0.33 mF Figure 26. Additional Application Diagram 3.3 V/5.0 A Converter with Remote Sense CS5157H 1.0 mF 1.0 mF Si4410 V CC2 V GATE( GATE(L) PGND 3 FFB LGND 100 pF 1N5818 22 W 1N4746 1 1 CC2 0 ...
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... D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019 Unit °C/W °C/W ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS5157H ...