MAX14720 Datasheet, PDF (17/38 Pages) Maxim Integrated Products – Extended System Battery Use Time

MAX14720/MAX14750
Power-Management Solution
I²C Register Descriptions
Table 2. ChipId Register (0x00)
ADDRESS:
0x00 (Read-Only)
BIT
7
6
5
4
3
2
1
0
NAME
ChipId[7:0]
Chip_Id[7:0]
Chip_Id[7:0] bits show information about the version of the MAX14720/MAX14750.
Table 3. ChipRev Register (0x01)
ADDRESS:
0x01 (Read-Only)
BIT
7
6
5
4
3
2
1
0
NAME
ChipRev[7:0]
ChipRev[7:0] ChipRev[7:0] bits show information about the revision of the MAX14720/MAX14750 silicon.
Table 4. BoostCDiv Register (0x03)
ADDRESS:
0x03
BIT
7
6
5
4
3
2
1
0
NAME
ClkDivEn
ClkDivSet[6:0]
ClkDivEn
Boost Current-Limited Output Mode Enable
This allows the boost regulator to be operated in a current limited output mode.
0: Normal Operation, Full Output Current Capability
1: Divided Clock Current Limited Mode
When the clock divider is enabled, the boost is operated with a fixed peak current limit and programmable
frequency. The peak current is set by BoostISet[2:0] and the switching frequency is determined by
ClkDivSet[6:0]. The regulator will stop switching when the voltage is above the set point and will only run when
the voltage is below the output setting. This mode can only be enabled once the output voltage is set higher
than the input voltage.
ClkDivSet[6:0]
Current-Limited Boost Clock Divider Setting
When the current limited mode is enabled, the frequency of the boost regulator in current limited mode will be
the frequency of the oscillator divided by the value of (10 + ClkDivSet[6:0]). The range is f_OSC/10 to f_OSC/137.
Table 5. BoostISet Register (0x04)
ADDRESS:
0x04
BIT
7
6
5
4
3
NAME
—
—
—
—
—
2
1
0
BoostISet[2:0]
BoostISet[2:0]
Buck-Boost Peak Current-Limit Setting
000: 0 (Minimum On-Time)
001: 50mA
010: 100mA
011: 150mA
100: 200mA
101: 250mA
110: 300mA
111: 350mA
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