ISL9113A Datasheet, PDF (1/10 Pages) Intersil Corporation – Skip mode under light-load condition

DATASHEET
Low Input Voltage and High Efficiency, Synchronous
Boost Converter with 1.3A Switch
ISL9113A
The ISL9113A provides a power supply solution for devices
powered by three-cell alkaline, NiCd, NiMH, or one-cell
Li-Ion/Li-Polymer batteries. It offers either a fixed 5V or an
adjustable output option for USB-OTG or portable HDMI
applications. The device is guaranteed to supply 500mA from
a 3V input and 5V output, and has a typical 1.3A peak current
limit. High 1.8MHz switching frequency allows for the use of
tiny, low-profile inductors, and ceramic capacitors to minimize
the size of the overall solution.
The ISL9113A is an internally compensated, fully integrated
synchronous converter optimized for efficiency with minimal
external components. At light load, the device enters Skip
mode and consumes only 20µA of quiescent current, resulting
in higher efficiency at light loads and maximum battery life.
The device is available in an 8 Ld DFN package.
Related Literature
• For a full list of related documents, visit our website
- ISL9113A product page
Features
• Up to 95% efficiency at typical operating conditions
• Input voltage range: 0.8V to 4.7V
• Output current: Up to 500mA (V_BAT = 3.0V, V_OUT = 5.0V)
• Low quiescent current: 20μA (typical)
• Logic control shutdown (I_Q < 1µA)
• 1.2V EN high logic
• Output disconnect during shutdown
• Skip mode under light-load condition
• Undervoltage lockout
• Fault protection: OVP, OTP, short-circuit
• 8 Ld 2mmx2mm DFN Package
Applications
• Products including portable HDMI and USB-OTG
• Smartphones
• Tablet and mobile internet devices
2.2µH
VBAT =
0.8 TO 4.7V
4.7µF
8
SW
7
VBAT
5
EN
2
VOUT
FB ⁴
GND ¹
VOUT =
5.0V/500mA
R1
523k
4.7µF
R2
100k
FIGURE 1. TYPICAL APPLICATION
100
V_BAT = 4.2V
95
V_BAT = 3.6V
90 ^{VBAT = 3.0V}
85
80
75
70
V_BAT = 1.2V
65
60
55
50
0.0001
0.001
0.01
LOAD CURRENT (A)
FIGURE 2. EFFICIENCY
V_BAT = 2.3V
V_OUT = 5.0V
0.1
1
January 4, 2017
1
FN8620.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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