SGM41518.pdf• High Efficiency, 1.5MHz, Synchronous Buck Charger
95% Charge Efficiency at 1A from 5V Input
Selectable PFM Mode for Light Load Efficiency
• Boost Mode Support
Boost Efficiency of 95.5% at 0.5A and 95% at 1A
PMID_GD Pin Control External P-MOSFET for
Protection against Fault Conditions
• Selectable PFM Mode for Light Load Operations
• Single Input for USB or High Voltage Adapters
3.9V to 13.5V Operating Input Voltage Range
22V Absolute Maximum Input Voltage Rating
Programmable Input Current Limit and Dynamic
Power Management (IINDPM, 100mA to 3.2A with
100mA Resolution) to Support USB 2.0 and USB 3.0
Standards and High Voltage Adaptors
Maximum Power Tracking by Programmable Input
Voltage Limit (VINDPM) with Selectable Offset
VINDPM Tracking of Battery Voltage
• High Battery Discharge Efficiency with 10mΩ Switch
• Narrow Voltage DC (NVDC) Power Path Management
Instant-On with No or Highly Depleted Battery
Ideal Diode Operation in Battery Supplement Mode
• Ship Mode, Wake-Up and Full System Reset Capability
by Battery FET Control
• Flexible Autonomous and I2C Operation Modes for
Optimal System Performance
• Fully Integrated Switches, Current Sense and
Compensation
• External Direct Charging Path Enable Output
• 9μA Ship Mode Low Battery Leakage Current
• High Accuracy
±0.5% Charge Voltage Regulation (8mV/step)
±5% Charge Current Regulation at 1.26A
±7.5% Input Current Regulation at 0.5A
• Safety
Battery Temperature Sensing (Charge/Boost Modes)
Thermal Regulation and Thermal Shutdown
Input Under-Voltage Lockout (UVLO)
Input Over-Voltage (ACOV) Protection
• Single chip solution to charge wearable
accessories from adapter or battery
• High-efficiency, 1.5-MHz, synchronous switchmode
buck charger
95.5% charge efficiency at 0.5 A and 94.5%
efficiency at 1 A
±0.5% charge voltage regulation (10-mV step)
I2C programmable JEITA profile of charge
voltage, current and temperature thresholds
Low termination current with high accuracy 20
mA±10 mA
Small inductor form factor of 2.5 x 2.0 x 1.0
mm3
• Boost mode with output from 4.6 V to 5.15 V
94% boost efficiency at 1-A output
Integrated control to switch between Charge
and Boost mode
PMID_GOOD pin control external PMOS FET
for protection against fault conditions
• Single input supporting USB input, high-voltage
adapter, or wireless power
Support 4-V to 13.5-V input voltage range with
22-V absolute max input rating
Programmable input current limit (IINDPM) with
I2C (100 mA to 3.2 A, 100-mA/step)
Maximum power tracking by input voltage limit
(VINDPM) up to 5.4 V
VINDPM threshold automatically tracks battery
voltage
• Narrow VDC (NVDC) power path management
System instant-on with no battery or deeply
discharged battery
• Flexible I2C configuration and autonomous
charging for optimal system performance
• High integration includes all MOSFETs, current
sensing and loop compensation
• Low RDSON 19.5-mΩ BATFET to minimize
charging loss and extend battery run time
BATFET control for Ship mode, and full system
reset with and without adapter
• 7-μA low battery leakage current in Ship mode
• 9.5-μA low battery leakage current with system
standby
• High accuracy battery charging profile
±6% charge current regulation
±7.5% input current regulation
Remote battery sensing to charge faster
Programmable top-off timer for full battery
charging
• Safety Related Certifications:
IEC 62368-1 CB Certification
