MAX4364/MAX4365
1.4W and 1W, Ultra-Small, Audio Power
Amplifiers with Shutdown
General Description
The MAX4364/MAX4365 are bridged audio power ampli-
fiers intended for portable audio devices with internal
speakers. The MAX4364 is capable of delivering 1.4W
from a single 5V supply and 500mW from a single 3V sup-
ply 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 external
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 TDFN (3mm x
3mm x 0.8mm) and μMAX® packages.
Applications
●● Cellular Phones
●● PDAs
●● Two-Way Radios
●● General-Purpose Audio
Features
●● 1.4W into 8Ω Load (MAX4364)
●● 1W into 8Ω Load (MAX4365)
●● 0.04% THD+N at 1kHz
●● 68dB PSRR at 217Hz
●● 2.7V to 5.5V Single-Supply Operation
●● 5mA Supply Current
●● Low-Power, 10nA Shutdown Mode
●● Pin Compatible with the LM4861/LM4862/LM4864
(MAX4364)
●● Clickless Power-Up and Shutdown
●● Thermal-Overload and Short-Circuit Protection
●● Available in TDFN, μMAX, and SO Packages
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4364ESA/V+T -40°C to +85°C 8 SO
—
MAX4365EUA+ -40°C to +85°C 8 µMAX
—
MAX4365ETA+
-40°C to +85°C 8 TDFN-EP* ACD
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
T = Tape and reel.
Pin Configurations appear at end of data sheet.
Typical Application Circuit/Functional Diagram
CBIAS
VCC
6
VCC
50kΩ
2 BIAS
50kΩ
CLICKLESS/POPLESS SHDN 1
SHUTDOWN CONTROL
OUT- 8
10kΩ
CIN
AUDIO
INPUT
RIN
3 IN+
4 IN-
10kΩ
MAX4364
OUT+ 5
GND 7
RF
μMAX is a registered trademark of Maxim Integrated Products, Inc.
19-2387; Rev 7; 11/17
