CS5151 Cherry Semiconductor Corporation, CS5151 Datasheet
CS5151
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CS5151 Summary of contents
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... The CS5151 is upwards com- patible with the 5-bit CS5156, allow- ing the mother board designer the capability of using either the CS5151 or the CS5156 with no change in layout. The CS5151 is available in 16 pin surface mount and DIP packages. ® processor with MMX™ Technology 5V 1200µ ...
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Pin Name .16V/-0.3V . ...
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Electrical Characteristics: 0°C < ID0 ID3 PARAMETER DAC: continued ID3 ID2 ID1 ID0 ...
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PACKAGE PIN # PIN SYMBOL 16L SO Narrow & PDIP 1,2,3,4 V – V ID0 OFF 8 V FFB 9 V CC2 10 V GATE 11 PGnd 13 V CC1 14 LGnd 15 ...
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V Monitor CC1 Comparator V CC1 - + 3.90V 3.85V SS V ID0 V ID1 Error 4 BIT Amplifier DAC + V ID2 V ID3 - Slow Feedback V FB COMP Fast Feedback V FFB LGnd 1V Theory of Operation ...
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... Trace 1 - Regulator Output Voltage (1V/div.) Trace 2 - Inductor Switching Node (2V/div.) Trace 3 - 12V input (V Trace Input (1V/div.) Figure 2: CS5151 demonstration board startup in response to increasing 12V and 5V input voltages. Extended off time is followed by normal off time operation when output voltage achieves regulation to the error amplifier output. ...
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... Figure 4). Trace 1 - Regulator Output Voltage (5V/div.) Trace 2 - Inductor Switching Node (5V/div.) Figure 4: CS5151 demonstration board enable startup waveforms. Normal Operation During normal operation, switch off time is constant and set by the C capacitor ...
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... Trace 1 - Regulator Output Voltage (1V/div.) Trace 3 - Regulator Output Current (20V/div.) Figure 7: CS5151 demonstration board response to a 0.5 to 13A load pulse (output set for 2.8V). Trace 1 - Regulator Output Voltage (1V/div.) Trace 2 - Inductor Switching Node (5V/div.) Trace 3 - Output Current (0 ...
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... Trace Supply Voltage (2V/div.) Trace 3 - Soft Start Timing Capacitor (1V/div.) Trace 2 - Inductor Switching Node (2V/div.) Figure 10: CS5151 demonstration board hiccup mode short circuit pro- tection. Gate pulses are delivered while the soft start capacitor charges, and cease during discharge. Trace from PC Power Supply (2V/div.) Trace 2 = Inductor Switching Node (2V/div ...
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... Applications Information: continued Channel GATE M1= V GATE Channel 2 = Inductor Switching Node Figure 15: CS5151 gate drive waveforms depicting rail to rail swing. The most important aspect of MOSFET performance is RDS , which effects regulator efficiency and MOSFET ON thermal management requirements. The power dissipated by the MOSFET and the Schottky diode may be estimated as follows ...
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C timing capacitor: OFF Period × duty cycle OFF 4848.5 where: 1 Period = switching frequency “Droop” Resistor for Adaptive Voltage Positioning Adaptive voltage positioning is used to reduce output volt- age excursions during abrupt changes ...
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R = TRACE I MAX This causes the output voltage to be +40mV with no load, and -40mV with a full load, improving regulator transient response. This trace must be wide enough to carry the full output current. (Typical ...
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... Tantalum 2 1,3 Connect to other circuits for current sharing 13 3.3V 12V + 33µF/25V x 3 Tantalum Si9410 CC2 CC1 GATE 5µH V ID0 V ID1 ID2 + CS5151 V ID3 2 MBR1535CT C OFF 1,3 SS PGnd 3.3k COMP V FFB LGnd 100pF 2.5V/7A 100µF/10V x 2 Tantalum ...
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... REF: JEDEC MS-012 8.26 (.325) 7.62 (.300) 3.68 (.145) 2.92 (.115) .356 (.014) .203 (.008) REF: JEDEC MS-001 Ordering Information Part Number Description CS5151GD16 16L SO Narrow CS5151GDR16 16L SO Narrow (tape & reel) CS5151GN16 16L PDIP Rev. 1/5/99 Package Specification D Thermal Data English R Min Max Min ΘJC R 9.80 .394 .386 Θ ...