ISL80020 Datasheet, PDF (1/16 Pages) Intersil Corporation – Negative current protection

DATASHEET
Compact Synchronous Buck Converters
ISL80020, ISL80020A, ISL80015, ISL80015A
The ISL80020, ISL80020A, ISL80015 and ISL80015A are highly
efficient, monolithic, synchronous step-down DC/DC converters
that can deliver up to 2A of continuous output current from a 2.7V
to 5.5V input supply. They use peak current mode control
architecture to allow very low duty cycle operation. They operate
at either 1MHz or 2MHz switching frequency, thereby providing
superior transient response and allowing for the use of small
inductors. They have excellent stability.
The ISL80020, ISL80020A, ISL80015 and ISL80015A integrate
very low r_DS(ON) MOSFETs in order to maximize efficiency. In
addition, since the high-side MOSFET is a PMOS, the need for a
Boot capacitor is eliminated, thereby reducing external
component count. They can operate at 100% duty cycle
(at 1MHz).
The device is configured in PWM (pulse width modulation) for
fast transient response, which helps reduce the output noise
and RF interference.
These devices are offered in a space saving 8 pin 2mmx2mm
TDFN lead free package with exposed pad for improved thermal
performance. The complete converter occupies less than
64mm² area.
Related Literature
Features
• V_IN range 2.7V to 5.5V
• I_OUT maximum is 1.5A or 2A (see Table 1 on page 2)
• Switching frequency is 1MHz or 2MHz (see Table 1 on page 2)
• Overcurrent and short circuit protection
• Over-temperature/thermal protection
• Negative current protection
• Power-good and enable
• 100% duty cycle (1MHZ)
• Internal soft-start and soft-stop
• V_IN undervoltage lockout and V_OUT overvoltage protection
• Up to 95% peak efficiency
Applications
• General purpose POL
• Industrial, instrumentation, and medical equipment
• Telecom and networking equipment
• Game console
UG026, “ISL800xxxDEMO1Z Demonstration Boards User
Guide”
VIN
GND
EN
PG
+2.7V...+5.5V
C1
22µF
1 _VIN
2 _EN
ISL80015, ISL80020
3 _SGND
4 _PG
EPAD
9
L1
PHASE ⁸
PGND ⁷
+1.8V/2A
C2
22µF
NC ⁶
FB ⁵
0.6V
C3
22pF
R1
200kΩ 1%
R2
100kΩ 1%
VOUT
GND
R₁
=
R₂


V^---V--F^--O--B^---
–
1_
(EQ. 1)
FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION
100
90
80
70
2.5V_OUT
1.5V_OUT
1.8V_OUT
3.3V_OUT
60
50
400.0 _{0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0}
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, f_SW = 2MHz, V_IN = 5V, T_A = +25°C
June 5, 2015
1
FN6692.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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