AT73C237 Atmel, AT73C237 Datasheet - Page 19

• Manufacturer Part Number: AT73C237
• Description: IC POWER MANAGEMENT UNIT 16QFN
• Manufacturer: Atmel

Specifications of AT73C237

• Applications: Wireless
• Current - Supply: 250µA
• Voltage - Supply: 2.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9. Functional Description
9.1
6362A–PMAAC–01-Jul-08
LDO1
The AT73C237 is a fully integrated, attractively priced, combined Power Management. It inte-
grates the following power supplies channels.
LDO1 is a 2.75V/70mA LDO, compatible with RF performances. LDO1 can work with supply
from 3.0V up to 5.5V and needs at least 300 mV of minimum drop-out. This LDO is designed to
supply the RF section of wireless devices, showing high PSRR up to 100 kHz with very low
noise on wide frequency bandwidth. LDO1 requires a 2.2 µF output capacitor.
Figure 9-1.
• Additionally, 1.80V output voltages programming is possible via the TWI serial interface.
VDD
LDO1 Functional Diagram
AV
V
on1
ESD
BG
SS
reference
overcurrent
current
detection
GNDA
V
DD1
vouts
sel1
V
IN
V
AT73C237
GNDA
O1
C
1
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