CS5155GD16 CHERRY [Cherry Semiconductor Corporation], CS5155GD16 Datasheet

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CPU 5-Bit Synchronous Buck Controller Description The CS5155 is a 5-bit synchronous dual N-Channel buck controller designed to provide unprece- dented transient response for todayÕs demanding high-density, high-speed logic. The regulator operates using a proprietary control method, which ...

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Pin Name 16V/-0.3V ...

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Electrical Characteristics: 0¡C < T DAC Code ID4 ID2 ID1 ID0 PARAMETER DAC: continued ID4 ID3 ID2 ID1 ID0 ...

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Electrical Characteristics: 0¡C < T DAC Code ID4 ID2 ID1 ID0 PARAMETER Soft Start (SS) Charge Time Pulse Period Duty Cycle COMP Clamp Voltage V SS Fault Disable FFB High ...

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PACKAGE PIN # PIN SYMBOL 16L SO Narrow & PDIP 7 C OFF 8 V FFB 9 V CC2 10 V GATE(H) 11 PGnd 12 V GATE( CC1 14 LGnd 15 COMP Monitor CC1 ...

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Theory of Operation 2 ª Control Method V 2 ª method of control uses a ramp signal that is gen- The V erated by the ESR of the output capacitors. This ramp is proportional to the AC current through the ...

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When regulator output voltage achieves the 1V level pre- sent at the COMP pin, regulation has been achieved and normal off time will ensue. The PWM comparator termi- nates the switch on time, with off time set by the C ...

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Trace1 - Regulator Output Voltage (10V/div.) Trace 2 - Inductor Switching Node (5V/div.) Figure 6: Peak-to-peak ripple 2.8V, I OUT Transient Response 2 ª control loopÕs 100ns reaction time pro- The CS5155 V vides unprecedented transient response ...

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Trace1 - Regulator Output Voltage (1V/div.) Trace 2 - Inductor Switching Node (5V/div.) Trace 3 - Output Current (13 to 0.5 Amps) (20V/div.) Figure 9: CS5155 demonstration board response to 13A load turn off ª control topology immediately connects 2 ...

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The bottom FET and board trace must be properly designed to implement the OVP function. Trace from PC Power Supply (5V/div.) Trace1 = Regulator Output Voltage (1V/div.) Trace 2 = Inductor Switching Node (5V/div.) Figure 12: OVP ...

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Trace 3 = 12V Input (V ) and V ) (10V/div.) CC1 CC2 Trace Input (2V/div.) Trace 1 = Regulator Output Voltage (1V/div.) Trace 2 = Power Good Signal (2V/div.) Figure 16: CS5155 demonstration board during power ...

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C timing capacitor: OFF Period ´ duty cycle OFF 4848.5 where: 1 Period = switching frequency Schottky Diode for Synchronous MOSFET A Schottky diode may be placed in parallel with the syn- chronous MOSFET to conduct ...

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Connect the ground terminals of the Compensation capacitor directly to the ground of the fast feedback filter capacitor to prevent common mode noise from effecting the PWM comparator. 5. Place the output filter capacitor(s) as close to the load ...

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... Lead Count Metric Max 16L SO Narrow 10.00 16L PDIP 19.18 REF: JEDEC MS-012 3.68 (.145) 2.92 (.115) REF: JEDEC MS-001 Ordering Information Part Number Description CS5155GD16 16L SO Narrow CS5155GDR16 16L SO Narrow (tape & reel) CS5155GN16 16L PDIP Rev. 1/22/99 Package Specification D Thermal Data English R Min Max ...