ISL91110IRAZ-T7A Renesas

DATASHEET ISL91110IR FN8709 Rev 0.00 High Efficiency Buck-Boost Regulator with 5.4A Switches April 17, 2015 The ISL91110IR is a high-current buck-boost switching regulator Features for systems using new battery chemistries. It uses Intersils Accepts input voltages above or below regulated output proprietary buck-boost algorithm to maintain voltage regulation voltage while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. Automatic and seamless transitions between buck and boost modes The ISL91110IR is capable of delivering at least 2A continuous output current (V = 3.3V) over a battery voltage range of 2.5V Input voltage range: 1.8V to 5.5V OUT to 4.35V. This maximizes the energy utilization of advanced Output current: up to 2A (PVIN = 3.4V, V = 5V) OUT single-cell Li-ion battery chemistries that have significant capacity Output current: up to 2A (PVIN = 2.5V, V = 3.3V) OUT left at voltages below the system voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent Burst current: up to 3A (PVIN = 2.9V, V = 3.3V, t < OUT ON current of only 35A optimize efficiency under all load conditions. 600s, t = 4.6ms) High efficiency: up to 95% The ISL91110IR supports standalone applications with a fixed 3.3V or 3.5V output voltage or adjustable output voltage with an 35A quiescent current maximizes light load efficiency external resistor divider. Output voltages as low as 1V or as high 2.5MHz switching frequency minimizes external component as 5.2V are supported. size The ISL91110IR requires only a single inductor and very few Fully protected for short-circuit, over-temperature and external components. Power supply solution size is minimized by undervoltage its 2.5MHz switching frequency, allowing small size external Small 4mmx4mm 20 Ld TQFN package components. The ISL91110IR is available in a 4mmx4mm, 20 Ld TQFN Applications package. Smartphones and tablet PCs TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS Wireless communication devices PART NUMBER ADJ or FIXED V OUT ISL91110IRNZ-T 3.3 Optical modules networking equipment ISL91110IRNZ-T7A 3.3 Related Literature ISL91110IR2AZ-T 3.5 UG022, ISL91110IRx-EVZ Evaluation Boards User Guide ISL91110IR2AZ-T7A 3.5 ISL91110IRAZ-T ADJ ISL91110IRAZ-T7A ADJ 100 ISL91110IRNZ V = IN V = 4.2V IN 1.8V TO 5.5V 95 PVIN LX1 C L 1 1 1H 2x10F 90 V = 3.3V LX2 OUT UP TO 3A VIN VOUT 85 EN C 2 2x22F V = 3.6V IN MODE FB 80 V = 3.3V IN 75 V = 3V IN 70 1 10 100 1000 LOAD CURRENT (mA) FIGURE 2. EFFICIENCY: V = 3.3V, T = +25C FIGURE 1. TYPICAL APPLICATION: V = 3.3V OUT A OUT FN8709 Rev 0.00 Page 1 of 13 April 17, 2015 SGND PGND EFFICIENCY (%)ISL91110IR Block Diagram LX1 LX2 4 5 1 2 6 7 17 Q1 PVIN 8 18 Q4 VOUT 9 19 GATE DRIVERS 20 AND EN 11 EN ANTI-SHOOT THRU - + Q2 Q3 VIN 10 VREF EN 3 PGND VIN MONITOR VOUT CLAMP THERMAL 13 SHUTDOWN SGND CURRENT 14 DETECT EN CONTROL 12 MODE 16 NC ADJ OSC EN OUTPUT ERROR FB 15 AMP - FIXED + + REF OUTPUT - COMP VOLTAGE PROG. FIGURE 3. BLOCK DIAGRAM FN8709 Rev 0.00 Page 2 of 13 April 17, 2015 REVERSE CURRENT