DATASHEET ISL80020, ISL80020A, ISL80015, ISL80015A FN6692 Rev 3.00 Compact Synchronous Buck Converters June 5, 2015 The ISL80020, ISL80020A, ISL80015 and ISL80015A are highly Features efficient, monolithic, synchronous step-down DC/DC converters V range 2.7V to 5.5V that can deliver up to 2A of continuous output current from a 2.7V IN to 5.5V input supply. They use peak current mode control I maximum is 1.5A or 2A (see Table 1 on page 2) OUT architecture to allow very low duty cycle operation. They operate Switching frequency is 1MHz or 2MHz (see Table 1 on page 2) at either 1MHz or 2MHz switching frequency, thereby providing Overcurrent and short circuit protection superior transient response and allowing for the use of small inductors. They have excellent stability. Over-temperature/thermal protection The ISL80020, ISL80020A, ISL80015 and ISL80015A integrate Negative current protection very low r MOSFETs in order to maximize efficiency. In DS(ON) Power-good and enable addition, since the high-side MOSFET is a PMOS, the need for a 100% duty cycle (1MHZ) Boot capacitor is eliminated, thereby reducing external component count. They can operate at 100% duty cycle Internal soft-start and soft-stop (at 1MHz). V undervoltage lockout and V overvoltage protection IN OUT The device is configured in PWM (pulse width modulation) for Up to 95% peak efficiency fast transient response, which helps reduce the output noise and RF interference. Applications These devices are offered in a space saving 8 pin 2mmx2mm General purpose POL TDFN lead free package with exposed pad for improved thermal Industrial, instrumentation, and medical equipment performance. The complete converter occupies less than 2 Telecom and networking equipment 64mm area. Game console Related Literature UG026, ISL800xxxDEMO1Z Demonstration Boards User Guide ISL80015, ISL80020 100 L1 +1.8V/2A +2.7V...+5.5V 1 8 VIN VOUT VIN PHASE C1 C2 90 22F 22F GND GND 2 7 EN PGND 80 C3 6 EN 3 NC 22pF SGND 2.5V OUT 3.3V 1.5V OUT R1 OUT 1.8V 70 OUT 200k 1% 4 5 EPAD PG PG FB 0.6V R2 9 100k 1% 60 50 V O (EQ. 1) 40 ------------ R = R 1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 1 2 VFB OUTPUT LOAD (A) FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION FIGURE 2. EFFICIENCY vs LOAD, f = 2MHz, V = 5V, T = +25C SW IN A FN6692 Rev 3.00 Page 1 of 16 June 5, 2015 EFFICIENCY (%) ISL80020, ISL80020A, ISL80015, ISL80015A TABLE 1. SUMMARY OF KEY DIFFERENCES I (MAX) f V RANGE V RANGE PACKAGE OUT SW IN OUT PART (A) (MHz) (V) (V) SIZE ISL80015 1.5 1 ISL80015A 1.5 2 2.7 to 5.5 0.6 to 5.5 8 pin 2mmx2mm TDFN ISL80020 2 1 ISL80020A 2 2 NOTE: In this datasheet, the parts listed in the table are collectively called device. TABLE 2. COMPONENT VALUE SELECTION TABLE V C1 C2 C3 L1 R1 R2 OUT (V) (F) (F) (pF) (H) (k ) (k ) 0.8 22 22 22 1.0~2.2 33 100 1.2 22 22 22 1.0~2.2 100 100 1.5 22 22 22 1.0~2.2 150 100 1.8 22 22 22 1.0~3.3 200 100 2.5 22 22 22 1.5~3.3 316 100 3.3 22 22 22 1.5~4.7 450 100 FN6692 Rev 3.00 Page 2 of 16 June 5, 2015