ISL8106 Intersil Corporation, ISL8106 Datasheet
ISL8106
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ISL8106 Summary of contents
Page 1
... Integrated MOSFET drivers, 5V LDO, and bootstrap diode result in fewer components and smaller implementation area for power supply systems. The ISL8106 features a 1.5ms digital soft-start and can be started into a pre-biased output voltage. A resistor divider is used to program the output voltage setpoint. The ISL8106 ...
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... ISL8106 PART MARKING TEMP (°C) 8106CRZ 0 to +70 8106IRZ -40 to +85 Evaluation Board PGOOD VIN BOOT CBOOT PVCC TGATE LX VCC BSOC R BSOC GND ISL8106 BGATE FCCM EN PGND COMP FSET FB VO PACKAGE PKG. DWG 4x4 QFN L16.4x4 16 Ld 4x4 QFN L16.4x4 ...
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Block Diagram VIN GND PACKAGE BOTTOM VCC V REF EN − OVP + − UVP + + EA EA − FB COMP − BSOC OCP 30Ω PGOOD LDO PWM FREQUENCY + − + ...
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... Thermal Information Thermal Resistance (Typical, Notes 1, 2) θ QFN Package . . . . . . . . . . . . . . . . . . . Junction Temperature Range . . . . . . . . . . . . . . . . . -55°C to +150°C Operating Temperature Range ISL8106CRZ 0°C to +70°C ISL8106IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature . . . . . . . . . . . . . . . . . . . . (soldering, 10s)+300°C Recommended Operating Conditions Ambient Temperature Range (ISL8106C 0° ...
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... TGATE falling to BGATE rising ATER t BGATEFTG BGATE falling to TGATE rising ATER V F PVCC = 5V 2mA 25V PGR SS PGOOD = 5mA Sink; ISL8106CRZ PGR UV PGR SS PGOOD = 5mA Sink; ISL8106IRZ PGR UV PGR OV PGOOD = 5mA Sink; ISL8106CRZ PGOOD = 5mA Sink; ISL8106IRZ PGR OC PGOOD = 5mA Sink; ISL8016CRZ PGOOD = 5mA Sink ...
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... GND (Bottom terminal pad) Signal common of the IC. Unless otherwise stated, signals are referenced to the GND pin, not the PGND pin. Connect the GND pad of the ISL8106 to the signal ground layer of the pcb using at least five vias, for a robust thermal and electrical conduction path. ...
Page 7
... V threshold, beginning from below the V CCR threshold. The ISL8106 uses a digital soft-start circuit to ramp the output voltage of the converter to the programmed regulation setpoint in approximately 1.5ms. The converter regulates to 600mV at the FB pin with respect to the GND pin. During soft-start a digitally derived voltage reference forces the converter to regulate from 0V to 600mV at the FB pin ...
Page 8
... V by pulling up towards the voltage at the VIN pin; the CC LDO has no pull-down capability. Pulse Width Modulator The ISL8106 is a hybrid of fixed frequency PWM control, and variable frequency hysteretic control. Intersil’ ISL8106 can simultaneously affect the PWM switching frequency and PWM duty cycle in response to input voltage and output load transients. The term “ ...
Page 9
... Overcurrent and Short-Circuit Protection When an OCP or SCP fault is detected, the ISL8106 overcurrent and short-circuit protection circuit will pull the PGOOD pin low and latch off the converter. The fault will ...
Page 10
... SP a multiplier relative Overvoltage When an OVP fault is detected, the ISL8106 overvoltage protection circuit will pull the PGOOD pin low and latch off the converter. The fault will remain latched until the EN pin is pulled below the voltage at the VIN pin is reduced ...
Page 11
... LX nodes. Use the remaining printed circuit layers for small signal wiring. Locate the ISL8106 within inches of the MOSFETs, Q1 and Q2 (1 inch or less for 500kHz or higher operation). The circuit traces for the MOSFETs’ gate and source connections from the ISL8106 must be sized to handle peak current ...
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... DUTY CYCLE FIGURE 5. NORMALIZED RMS INPUT CURRENT FOR x = 0.8 12 ISL8106 . In addition to the bulk capacitance, some low ESL ceramic PP capacitance is recommended to decouple between the drain terminal of the top-side MOSFET and the source terminal of the bottom-side MOSFET, in order to reduce the voltage ringing created by the switching current across parasitic circuit elements ...
Page 13
... Compensating the Converter The LC output filter has a double pole at its resonant frequency that causes the phase to abruptly roll downward. The R modulator used in the ISL8106 makes the LC output filter resemble a first order system in which the closed loop stability can be achieved with a Type II compensation network. ...
Page 14
... The control loop model of the ISL8106 is partitioned into function blocks consisting of: - The duty cycle to Vo transfer function G determined by the value of the output power components, input voltage, and output voltage. - The Vcomp to duty cycle transfer function F is determined by the PWM frequency, input voltage, ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 15 ISL8106 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) ...