SC621_09 datasheet(19/23 Pages) SEMTECH

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SC621

Table 2 — Flash/Spotlight Control Bits

FL_2

FL_1

FL_0

FL/

SPLB

Flash/Spotlight

Current (mA)

OFF

100

150

200

250

OFF

300(1)

350(1)

400(1)

Note:

(1)

When on continuously, the device may reach the temperature

limit with 300mA and higher.

FL/SPLB

This bit is used to select either the flash or spotlight

current ranges. If this bit is set, the FL current sink can

be used to drive a flash of maximum duration 500ms and

the current range will be the high (flash) current range. If

this bit is cleared, the FL current sink can be used to drive

a continuous spotlight at a lower current and the current

range will be the lower (spotlight) current range, as shown

in Table 2.

LDO Control Register (0x03)

This register is used to enable the LDOs and to set their

output voltages.

LDO2[2:0]

These bits are used to set the output voltage of LDO2, as

shown in Table 3.

LDO2_2

LDO2_1

LDO2_0

LDO2

Output Voltage

OFF

1.8V

1.7V

1.6V

1.5V

101 through 111 are not used

OFF

Table 3 — LDO2 Control Bits

LDO1[3:0]

These bits set the output voltage of LDO1, as shown in

Table 4.

LDO1_3

LDO1_2

LDO1_1

LDO1_0

LDO1

Output

Voltage

0000

OFF

0001

3.3V

0010

3.2V

0011

3.1V

0100

3.0V

0101

2.9V

0110

2.8V

0111

2.7V

1000

2.6V

1001

2.5V

1010 through 1111 are not used

OFF

Table 4 — LDO1 Control Bits

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