AT73C237 Atmel, AT73C237 Datasheet - Page 8

• 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

8
AT73C237
Figure 6-1.
Load fuse regs
HPBG en=0
VDD3 Monitor en=0
LDO3 en=0
LDO2 en=0
LDO1 en=0
XRESO=0
HPBG en=1
VDD3 Monitor en=0
LDO3 en=0
LDO2 en=0
LDO1 en=0
XRESO=0
HPBG en=1
VDD3 Monitor en=1
LDO3 en=0
LDO2 en=0
LDO1 en=0
XRESO=0
HPBG en=1
VDD3 Monitor en=1
LDO3 en=1
LDO2 en=1
LDO1 en=1
XRESO=1
HPBG en=1
VDD3 Monitor en=1
LDO3 en=1
LDO2 en=1
LDO1 en=1
XRESO=1
HPBG en=1
VDD3 Monitor en=1
LDO3 en=1
LDO2 en=1
LDO1 en=1
XRESO=XRESIN
Startup Procedure
POR reset signal goes to low
RCOSC Running
VDD4 is present
VDD3 > 2.7V
Wait 180ms
Wait 4ms
Wait 1ms
Wait xms
HPBG
VDD3
LDOs
Reset
Reset
Gen.
Start
Start
Test
Ext.
100µs (1 clock pulse)
32 clock pulses
VDD3 < 2.6V
Wait 1ms
VDD3 < 2.6V
Wait 1ms
VDD3 < 2.6V
Wait 1ms
6362A–PMAAC–01-Jul-08