LP3921SQ/NOPB ,Battery Charger Management and Regulator Unit with Integrated Boomer Audio Amplifier 32-WQFN -40 to 85FEATURES DESCRIPTIONThe LP3921 is a fully integrated charger and multi-23• Chargerregulator unit wi ..
LP3927ILQ-AJ ,Cellular/PCS System Power Management ICApplicationsVEXT pin. LDO3, LDO4 and LDO5 each have its indepen-n Cellular/PCS handsetsdent enable ..
LP3927ILQX-AH ,Cellular/PCS System Power Management ICFunctional Description1 VO1 150 mA, LDO1 output pin.2 EN5 LDO5 enable input.3 EN4 LDO4 enable input ..
LP3927ILQX-AJ ,Cellular/PCS System Power Management ICGeneral Description Key Specificationsn 3.0V to 5.5V Input Voltage RangeThe LP3927 system power man ..
LP3928TL-1828 ,High Speed Bi-Directional Level Shifter and Ultra Low-Dropout CMOS Voltage RegulatorFeaturestrolled.Signalsgoingfrom2.85Vto1.8Vcanalsobelatchedusing an external clock source. The latc ..
LP3931ISQ ,Dual RGB LED Driver with High Current Boost DC-DC ConverterFeaturesn High Efficiency Programmable 300 mA Magnetic BoostThe LP3931 is a RGB LED driver with hig ..
LT1027DCN8-5 ,Precision 5V Reference
LT1027ECS8-5#PBF ,Precision 5 Volt Reference
LT1028ACJ8 ,Ultra Low Noise Precision High Speed Op Amps
LT1028AMH ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LP3921SQ/NOPB
Battery Charger Management and Regulator Unit with Integrated Boomer Audio Amplifier
LP3921
www.ti.com SNVS580A –AUGUST 2008–REVISED MAY 2013
LP3921 Battery Charger Management and Regulator Unit with Integrated Boomer™ Audio
Amplifier
Checkfor Samples: LP3921
1FEATURES DESCRIPTIONThe LP3921isa fully integrated charger and multi-
23• Charger regulator unit witha fully differential Boomer audio
– DC Adapteror USB Input power amplifier designed for CDMA cellular phones.
Thermally Regulated Charge Current The LP3921 hasa high-speed serial interface which
allows for the integration and control ofa Li-Ion
– Under Voltage Lockout battery charger, 7 low-noise low-dropout (LDO)
– 50to 950 mA Programmable Charge voltage regulators anda Boomer audio amplifier.
CurrentThe Li-Ion charger integratesa power FET, reverse
• 3.0Vto 5.5V Input Voltage Range current blocking diode, sense resistor with current
• Thermal Shutdown monitor output, and requires onlya few external
I2 C-Compatible Interface for Controlling components. Charging is thermally regulated to
obtain the most efficient charging rate fora given
Charger, LDO Outputs and Enabling Audioambient temperature.
Output LDO's7 Low-Noise LDO’s LDO regulators provide high PSRR and low noise
ideally suited for supplying powerto both analog and
– 2x 300 mA digital loads.
– 3x 150 mAThe Boomer Audio Amplifieris capableof delivering
– 2x80 mA 1.1 wattsof continuous average powerto an 8Ω BTL
2% (typ.) Output Voltage Accuracy on LDO's load with less than 1% distortion (THD+N). Boomer
• Audio Audio Power Amplifiers were designed specificallyto
Fully Differential Amplification provide high quality output power witha minimal
amountof external components. The Boomer Audio
– Abilityto Drive Capacitive Loads upto 100 Amplifier does not require output coupling capacitors
pF or bootstrap capacitors, and thereforeis ideally suited
– No Output Coupling Capacitors, Snubber for mobile phone and other low voltage applications
Networksor Bootstrap Capacitors Required where minimal power consumption and part countis
the primary requirement. The Boomer Audio Amplifier
• Space-Efficient 32-pin5x5 mm WQFN contains advanced pop & click circuitry which
Package eliminates noises during turn-on and turn-off
transitions.
Handsets
