1FEATURES
2· Maximize Battery Life and Minimize Heat
– 0.5-mA Shutdown Current
– 3-mA Quiescent Current
– High Efficiency Class-D
– 88% at 400mW at 8Ω
– 80% at 100mW at 8Ω
· Short Circuit Auto-recovery
· Gain of 2 V/V (6dB)
· Only One External Component Required
– Internal Matched Input Gain and Feedback
Resistors for Excellent PSRR and CMRR
– Optimized PWM Output Stage Eliminates
LC Output Filter
– PSRR (–75 dB) and Wide Supply Voltage
(2.5 V to 5.5 V) Eliminates Need for a
Dedicated Voltage Regulator
– Fully Differential Design Reduces RF
Rectification and Eliminates Bypass
Capacitor
– CMRR (–69 dB)Eliminates Two Input
Coupling Capacitors
· Thermal and Short-Circuit Protection
· Pinout Similar to the TPA2010D1
· Wafer Chip Scale Packaging (WCSP)
– NanoFree™ (YZF)

APPLICATIONS
· Wireless Handsets, PDAs, and other mobile
devices

DESCRIPTION
The TPA2035D1 is a 2.75-W high efficiency filter-free
class-D audio power amplifier in an approximately
1.5-mm × 1.5-mm wafer chip scale package (WCSP)
that requires only one external component. The
pinout is the same as the TPA2010D1 (SLOS417) except that the external gain setting input resistors
required by the TPA2010D1 are integrated into the
fixed gain of the TPA2035D1.
Features like –75dB PSRR and improved
RF-rectification immunity with a small PCB footprint
(WCSP amplifier plus single decoupling cap) make
the TPA2035D1 ideal for wireless handsets. A fast
start-up time of 3.2 ms with minimal pop makes the
TPA2035D1 ideal for PDA applications.
In wireless handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2035D1. The TPA2035D1 has a low 27-mV noise floor, A-weighted.