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Description
The FAN54010 family (FAN5401X) combines a highly Integrated Switch-Mode Charger, to minimize single-cell Lithiumion (Li-Ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery.

Features
■ Fully Integrated, High-Efficiency Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
■ Faster Charging than Linear
■ Charge Voltage Accuracy: ±0.5% at 25°C ±1% from 0 to 125°C
■ ±5% Input Current Regulation Accuracy
■ ±5% Charge Current Regulation Accuracy
■ 20V Absolute Maximum Input Voltage
■ 6V Maximum Input Operating Voltage
■ 1.45A Maximum Charge Rate
■ Programmable through High-Speed I2C Interface (3.4Mb/s) With Fast Mode Plus Compatibility
    – Input Current
    – Fast-Charge / Termination Current
    – Charger Voltage
    – Termination Enable
■ 3MHz Synchronous Buck PWM Controller With Wide Duty Cycle Range
■ Small Footprint 1μH External Inductor
■ Safety Timer With Reset Control
■ 1.8V Regulated Output from VBUS for Auxiliary Circuits
■ Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage
■ Low Reverse Leakage to Prevent Battery Drain to VBUS
■ 5V, 500mA Boost Mode for USB OTG for 3.0 to 4.5V Battery Input

Applications
■ Cell Phones, Smart Phones, PDAs
■ Tablet, Portable Media Players
■ Gaming Device, Digital Cameras

Description
The FAN5400 family (FAN540X) combines a highly Integrated Switch-Mode Charger, to minimize single-cell Lithium-ion (Li-Ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery.
The charging parameters and operating modes are programmable through an I2C Interface that operates up to 3.4Mbps. The Charger and boost regulator circuits switch at 3MHz to minimize the size of external passive components.
The FAN540X provides battery charging in three phases: conditioning, constant current, and constant voltage.

Features
■ Fully Integrated, High-Efficiency Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
■ Faster Charging than Linear
■ Charge Voltage Accuracy:   ±0.5% at 25°C
                                        ±1% from 0 to 125°C
■5% Input Current Regulation Accuracy
■5% Charge Current Regulation Accuracy
■ 20V Absolute Maximum Input Voltage
■ 6V Maximum Input Operating Voltage
■ 1.25A Maximum Charge Rate
■ Programmable through High-Speed I2C Interface (3.4Mb/s) With Fast Mode Plus Compatibility
   – Input Current
   – Fast-Charge / Termination Current
   – Charger Voltage
   – Termination Enable
■  3MHz Synchronous Buck PWM Controller With Wide Duty Cycle Range
■ Small Footprint 1H External Inductor
■ Safety Timer With Reset Control
■ 1.8V Regulated Output from VBUS for Auxiliary Circuits
■ Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage
■ Low Reverse Leakage to Prevent Battery Drain to VBUS
■ 5V, 300mA Boost Mode for USB OTG for 2.5 to 4.5V Battery Input

Applications
■ Cell Phones, Smart Phones, PDAs
■ Tablet, Portable Media Players
■ Gaming Device, Digital Cameras

General Description
The RT9503A is a Fully Integrated low cost single-cell LiIon battery Charger IC ideal for portable applications. The RT9503A is capable of being powered up via the AC adapter and USB (Universal Serial Bus) port inputs. The RT9503A can automatically detect and select the AC adapter and the USB port as the power source for the Charger. The RT9503A enters sleep mode when both supplies are removed.

Features
Automatic Input Supplies Selection
18V Maximum Rating for AC Adapter
Integrated Selectable 100mA and 500mA USB Charge Current
Internal Integrated Power MOSFETs
AC Adapter Power Good Status Indicator
Charge Status Indicator
External Capacitor Programmable Safety Timer
Under Voltage Protection
Over Voltage Protection
Automatic Recharge Feature
Battery Temperature Monitoring
Small 16-Lead WQFN Package
Thermal Feedback Optimizing Charge Rate
Power Path Controller
RoHS Compliant and Halogen Free

Applications
Digital Cameras
Cellular Phones
PDAs , Smart Phones and MP3 Players
Portable Instruments

General Description
The RT9503 is a Fully Integrated low cost single-cell LiIon battery Charger IC ideal for portable applications. The
RT9503 is capable of being powered up from AC adapter and the USB (Universal Serial Bus) port inputs. The
RT9503 can automatically detect and select the AC adapter and the USB port as the power source for the
Charger. The RT9503 enters sleep mode when both supplies are removed.

Features
Automatic Input Supplies Selection
18V Maximum Rating for AC Adapter
Integrated Selectable 100mA and 500mA USB Charge Current
Internal Integrated Power FETs AC Adapter Power Good Status Indicator
Charge Status Indicator
External Capacitor Programmable Safety Timer
Under Voltage Protection
Over Voltage Protection
Automatic Recharge Feature
Battery Temperature Monitoring
Small 16-Lead WQFN Package
Thermal Feedback Optimizing Charge Rate
Power Path Controller
RoHS Compliant and 100% Lead (Pb)-Free

Applications
Digital Cameras
Cellular Phones
PDAs and Smart Phones and MP3
Portable Instruments

The MAX8903A is an Integrated 1-cell Li+ Charger and Smart Power Selector With dual (AC adapter and USB) power inputs. The switch mode Charger uses a high switching frequency to eliminate heat and allow tiny external components. It can operate With either separate inputs for USB and AC adapter power, or from a single input that accepts both. All power switches for charging and switching the load between battery and external power are included on-chip. No external MOSFETs, blocking diodes, or current-sense resistors are required.

Description
The L6924U is a Fully monolithic battery Charger that safely charges single-cell Li-Ion/Polymer battery from either an USB power source or an AC adapter. In USB mode, the L6924U supports both low power and high power mode. Alternatively the device can charge from an AC wall adapter. The ideal solution for space-limited portable products integrates the power MOSFET, reverse blocking diode, sense resistor and thermal protection into a compact VFQFPN16 package. When an external voltage regulated adapter or USB port is used, the L6924U works in linear mode, and charges the battery in a constant current constant voltage (CC/CV) profile. Moreover, when a current-limited adapter is used, the device can operate in quasi-pulse mode, dramatically reducing the power dissipation. Regardless of the charging approach, a closed loop thermal control avoids device overheating. The device has an operating input voltage ranging from 2.5 V to 12 V and it allows the user to program many parameters, such as fast-charge current, end-of-charge current threshold, and charge timer. The L6924U offers two open collector outputs for diagnostic purposes, which can be used to either drive two external LEDs or communicate With a host microcontroller. Finally, the L6924U also provides other features like gas gauge function, check for battery presence, and monitors and protects the battery from unsafe thermal conditions.

Features
■ Fully Integrated solution, With power MOSFET, reverse blocking diode, sense resistor, and thermal protection
■ Charges single-cell Li-Ion batteries from selectable AC adapter or USB input
■ Programmable charge current up to 1 A in AC adapter mode
■ Programmable charging current in USB mode for both high power and low power inputs
■ 4.2 V output voltage With ± 1 % accuracy
■ Linear or quasi-pulse operating mode
■ Closed loop thermal control
■ Programmable end-of-charge current
■ Programmable charge timer
■ (NTC) or (PTC) thermistor interface for battery temperature monitoring and protection
■ Status outputs to drive LEDs or to interface With a host processor
■ Small VFQFPN 16-leads package (3 x 3 mm)

Applications
■ PDAs, GPS and MP3 players
■ USB powered devices
■ Cellular phones
■ Digital still cameras
■ Standalone Chargers
■ Wireless appliances

INTRODUCTION
The SMB138 is a programmable single-cell lithium-ion/lithium-polymer battery Charger designed for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity LiIon batteries via a USB or AC adapter input. Unlike conventional devices, the SMB138’s high-efficiency, Switch-Mode operation eliminates the thermal problems of conventional linear solutions. Also the buck converter architecture effectively multiplies the input current to increase charge rate for the Li+ cell and uses current limited supplies like USB more efficiently. The SMB138 also supports USB On-the-Go devices by providing the required USB-OTG +5V power supply using the Li-Ion battery as a source.

FEATURES & APPLICATIONS
• USB or AC input With programmable input current limiting
• Up to 1.25A continuous charging current from AC adapter
• Up to 750mA charging current from 500mA USB port using automatic TurboCharge™ mode
• +4.35 to +6.2V input voltage range (+16V tolerant)
• Two product options:
   o SMB138A: Charger off until I2C command initiation, enable/disable control via I2C
   o SMB138C: Charger powers up in charging mode, enable/disable control via I2C
• USB “On-the-Go” Power support for USB OTG enabled devices (+5V reverse output @ 200mA)
• Reverse current blocking (<5uA)
• High-efficiency 3MHz voltage-mode step-down regulator
• Integrated frequency compensation
• Internal power MOSFETs and precision current sensing
• High-accuracy float voltage regulation: 1%
• Thermal regulation (current foldback)
• Trickle charging
• Pre-charge and complete-charge (36/240min) safety timers
• Digital programming of all major parameters via I2C interface
   o Fast charge voltage threshold, float voltage
   o Pre-charge, fast charge, termination current
• Status register monitors and flags Charger operation
   o Charge in-progress/termination
   o Charge timer fault
   o OC/UV/OV detection/shutdown
• uCSP-19 lead-free package (0.4mm ball pitch)

Applications
• 2.5/3/3G+ GSM/CDMA/WCDMA Phones
• Smartphones/PDAs
• Portable Media Players
• Portable GPS Terminals

Description
The FAN5404X family includes I2C controlled 1.55 A USBcompliant Switch-Mode Chargers With power path operation and USB OTG boost operation. Integrated With the Charger, the IC supports production test mode, which provides 4.2 V at up to 2.3 A to the system.

Features
■ Fully Integrated, High-Efficiency Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
■ Power Path Circuit Ensures Fast System Startup With a Dead Battery when VBUS is Connected
■ 1.55 A Maximum Charge Current
■ Float Voltage Accuracy:
    - ±0.5% at 25°C
    - ±1% from 0 to 125°C
■ 5% Input and Charge Current Regulation Accuracy
■ Temperature-Sense Input Prevents Auto-Charging for JEITA Compliance
■ Thermal Regulation and Shutdown
■ 4.2 V at 2.3 A Production Test Mode
■ 5 V, 500 mA Boost Mode for USB OTG
■ 28 V Absolute Maximum Input Voltage
■ 6 V Maximum Input Operating Voltage
■ Programmable through High-Speed I2C Interface (3.4 Mb/s) With Fast Mode Plus Compatibility
    - Input Current
    - Fast-Charge / Termination Current
    - Float Voltage
    - Termination Enable
■ 3 MHz Synchronous Buck PWM Controller With Wide Duty Cycle Range
■ Small Footprint 1 μH External Inductor
■ Safety Timer With Reset Control
■ Dynamic Input Voltage Control
■ Very Low Battery Current when Charger Inactive

Applications
■ Cell Phones, Smart Phones, PDAs
■ Tablet, Portable Media Players
■ Gaming Device, Digital Cameras

Features
■ Fully Integrated solution, With a power MOSFET, reverse blocking diode, sense resistor, and thermal protection
■ Ideal for coke and graphite anode single-cell Li-Ion packs
■ Both linear and quasi-pulse operation
■ Closed loop thermal control
■ USB BUS-compatible
■ Programmable charge current up to 1A
■ Programmable pre-charge current
■ Programmable end-of-charge current
■ Programmable pre-charge voltage threshold
■ Programmable charge timer
■ Programmable output voltage at 4.1V and 4.2V, With ±1% output voltage accuracy
■ (NTC) or (PTC) thermistor interface for battery temperature monitoring and protection
■ Flexible charge process termination
■ Status outputs to drive LEDs or to interface With a host processor
■ Small VFQFPN 16-leads package (3mm x 3mm)

Applications
■ PDAs
■ Handheld devices
■ Cellular phones
■ Digital cameras
■ Standalone Chargers
■ USB-Powered Chargers