General Description
The MAX18000 is a nanoPower boost converter with an
input voltage range of 0.5V to 5.5V (VOUT > VIN + 0.2V)
and a switching current limit of 3.6A. It features an ultralow
quiescent current of 512nA which makes it ideal for
battery-powered applications requiring a long standby
time. The IC operates in nanoPower mode at low loads
and transitions into skip and CCM modes of operation at
higher load currents to ensure high efficiency over a
wide current range.
The output voltage can be varied between 2.5V and 5.5V
using a single RSEL resistor.
The IC features a True Shutdown™ mode, which
disconnects VIN and VOUT when the EN pin is pulled
low. It also features short-circuit protection circuitry that
limits the current to 700mA when VOUT < 0.5V and
automatically restarts the part when the fault is removed.
The thermal-shutdown protection disables the part when
the junction temperature crosses +165°C (typ).
The IC is available in 1.07mm x 1.57mm, 6-bump waferlevel package (WLP).

Benefits and Features
• 0.5V to 5.5V Input Voltage (VOUT > VIN + 0.2V)
• 1.8V Minimum Start-Up Voltage
• 2.5V to 5.5V (In 100mV Steps) Output Voltage
• 3.6A Cycle-by-Cycle Inductor Current Limit
• 512nA IQ Supply Current into the Output
• True-Shutdown Mode
- 7nA Shutdown Current
- Output Disconnects from Input with no
Forward or Reverse Current
• Output Short-Circuit Protection
• Thermal-Shutdown Protection
• 95% Peak Efficiency with 90% or Higher
Efficiency for Load > 20μA
• 1.07mm x 1.57mm, 0.5mm Pitch 6-Bump WLP
• -40°C to +125°C Operating Temperature Range

Key Applications
• Wearable Applications
• IoT Applications
• Battery-Powered Applications
• Portable Devices
• Metering Applications