(Hong Kong)
Product Summary
The SC1470ITSTR is a single output, constant on-time synchronous-buck PWM controller intended for use in notebook computers and other battery operated portable devices. Features include high efficiency and fast dynamic response with no minimum on time. The excellent transient response means that SC1470ITSTR based solutions will require less output capacitance than competing fixed frequency converters. Applications are (1)Notebook computers; (2)CPU I/O supplies; (3)Handheld terminals and PDAs; (4)LCD monitors; (5)Network power supplies.
Parametrics
SC1470ITSTR absolute maximum ratings: (1)TON to VSSA: -0.3 to +25.0 V; (2)DH, BST to PGND: -0.3 to +30.0 V; (3)LX to PGND: -2.0 to +25.0 V; (4)PGND to VSSA: -0.3 to +0.3 V; (5)BST to LX-0.3 to +6.0 V; (6)DL, ILIM, VDDP to PGND: -0.3 to +6.0 V; (7)EN/PSV, FB, PGD, VCCA, VOUT to VSSA: -0.3 to +6.0 V; (8)VCCA to EN/PSV, FB, PGD, VOUT: -0.3 to +6.0 V; (9)Thermal Resistance Junction to Ambient (2)θ JA: 100 °C/W; (10)Operating Junction Temperature Range TJ: -40 to +125 °C; (11)Storage Temperature Range T STG: -65 to +150 °C; (12)Lead Temperature (Soldering)10 Sec. T LEAD: 300 °C.
Features
SC1470ITSTR features: (1)Constant on-time for fast dynamic response; (2)Programmable VOUT range = 0.5 – VCCA; (3)VBAT range = 1.8V – 25V; (4)DC current sense using low-side RDS(ON)sensing or sense resistor; (5)Resistor programmable frequency; (6)Cycle-by-Cycle current limit; (7)Digital soft-start; (8)Combined EN and PSAVE functions; (9)Over-voltage/under-voltage fault protection and Power Good output; (10)10μA typical shutdown current; (11)Low quiescent power dissipation; (12)14 Lead TSSOP package; (13)Industrial temperature range; (14)1% Internal reference (2% system DC accuracy); (15)Integrated gate drivers with soft switching.
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