LP5551SQX/NOPB National Semiconductor, LP5551SQX/NOPB Datasheet - Page 17

• Manufacturer Part Number: LP5551SQX/NOPB
• Description: IC ENERGY MGMNT SYSTEM 36-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP5551SQX/NOPB

• Applications: Handheld/Mobile Devices
• Current - Supply: 431µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-LLP
• For Use With: LP5551SQEV - BOARD EVALUATION LP5551SQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP5551SQX

R1 - Unused Register
Address 0x1
Type R/W
Reset Default 8h’00
R2 – VO3 Voltage Register (Memory Retention Voltage)
Address 0x2
Type R/W
Reset Default 8h’60
Bit
7
6:0
Bit
7:0
Bit
7
6:3
2:0
Field Name
Sign
Voltage
Field Name
Sign
Voltage
Unused
Field Name
Unused
Description or Comment
This bit is fixed to ‘0’. Reading this bit will result in a ‘0’. Any data written into this bit
position using the Register Write command is ignored.
Core voltage value. Default value is in bold.
Voltage Data Code [7:0]
7h’00
7h’xx
7h’7f
Description or Comment
This bit is fixed to ‘0’. Reading this bit will result in a ‘0’. Any data written into this bit
position using the Register Write command is ignored.
Fixed voltage value. A code of all ones indicates maximum voltage while a code of
all zero indicates minimum voltage. Default value is in bold.
Voltage Data Code [6:3]
4h’0
4h’1
4h’2
4h’3
4h’4
4h’5
4h’6
4h’7
4h’8
4h’9
4h’A
4h’B
4h’C
4h’D
4h’E
4h’F
These bits are fixed to ‘0’. Reading these
bits will result in a ‘000’. Any data written
into these bits using the Register Write
command is ignored.
Description or Comment
Write transactions to this register are ignored. Read transactions will
return a “No Response Frame.” A no response frame contains all zeros
(see PWI 1.0 specification).
17
Voltage Value (V)
0.6
Linear scaling
1.2 (default)
Voltage Value (volts)
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.20 (default)
1.25
1.3
1.35
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