MAX4364 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 1.4W and 1W, Ultra-Small, Audio Power Amplifiers with Shutdown

19-2387; Rev 1; 10/02
1.4W and 1W, Ultra-Small, Audio Power
Amplifiers with Shutdown
General Description
The MAX4364/MAX4365 are bridged audio power
amplifiers intended for portable audio devices with
internal speakers. The MAX4364 is capable of deliver-
ing 1.4W from a single 5V supply and 500mW from a
single 3V supply into an 8Ω load. The MAX4365 is
capable of delivering 1W from a single 5V supply and
450mW from a single 3V supply into an 8Ω load. The
MAX4364/MAX4365 feature 0.04% THD + N at 1kHz,
68dB PSRR at 217Hz and only 10nA of supply current
in shutdown mode.
The MAX4364/MAX4365 bridged outputs eliminate the
need for output-coupling capacitors, minimizing exter-
nal component count. The MAX4364/MAX4365 also
include internal DC bias generation, clickless operation,
short-circuit and thermal-overload protection. Both
devices are unity-gain stable, with the gain set by two
external resistors.
The MAX4364 is available in a small 8-pin SO package.
The MAX4365 is available in tiny 8-pin thin QFN
(3mm ✕ 3mm ✕ 0.8mm) and µMAX packages.
Applications
Cellular Phones
PDAs
Two-Way Radios
General-Purpose Audio
Features
o 1.4W into 8Ω Load (MAX4364)
o 1W into 8Ω Load (MAX4365)
o 0.04% THD + N at 1kHz
o 68dB PSRR at 217Hz
o 2.7V to 5.5V Single-Supply Operation
o 5mA Supply Current
o Low-Power, 10nA Shutdown Mode
o Pin Compatible with the LM4861/LM4862/LM4864
(MAX4364)
o Clickless Power-Up and Shutdown
o Thermal-Overload and Short-Circuit Protection
o Available in Thin QFN, µMAX, and SO Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4364ESA -40°C to +85°C 8 SO
MAX4365EUA -40°C to +85°C 8 µMAX
MAX4365ETA -40°C to +85°C 8 Thin QFN-EP*
*EP = Exposed paddle.
TOP
MARK
—
—
ACD
Pin Configurations appear at end of data sheet.
Typical Application Circuit/Functional Diagram
C_BIAS
VCC
6
VCC
50kΩ
2 BIAS
50kΩ
CLICKLESS/POPLESS SHDN 1
SHUTDOWN CONTROL
OUT- 8
3 IN+
C_IN
AUDIO
R_IN
4 _IN-
INPUT
10kΩ ^10kΩ
OUT+ 5
MAX4364 _{GND 7}
R_F
________________________________________________________________ Maxim Integrated Products 1
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1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.