1x/1.5x/2x White LED Charge Pumps with Two

LDOs in 4mm x 4mm TQFN

8

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Pin Description

PIN

NAME

FUNCTION

1

PIN

Supply Voltage Input. Bypass to PGND with a 10µF ceramic capacitor. The input voltage range is

2.7V to 5.5V. PIN is high impedance during shutdown.

2IN

Chip Supply Voltage Input. Bypass to GND with a 10µF ceramic capacitor as close as possible to the

IC. The input voltage range is 2.7V to 5.5V. IN is high impedance during shutdown.

3

GND

Ground. Connect GND to system ground and the input bypass capacitor as close as possible to the IC.

4

LDO1

LDO1 Output. Bypass with a 1µF ceramic capacitor to GND. LDO1 is pulled to ground through an

internal 400k

Ω resistor during shutdown.

5

LDO2

LDO2 Output. Bypass with a 1µF ceramic capacitor to GND. LDO2 is pulled to ground through an

internal 400k

Ω resistor during shutdown.

6

REFBP

Reference Filter. Bypass REFBP with a 0.01µF ceramic capacitor to GND.

7

SETF

Bias Current Set Input for F1, F2. The current flowing out of SETF sets the maximum (100%) bias

8

SETM

Bias Current Set Input for M1–M4. The current flowing out of SETM sets the maximum (100%) bias

9, 10

F2, F1

400mA Combined-Current Flash LED Cathode Connection and Charge-Pump Feedback. Current flowing

input forces OUT to operate at approximately 5V. Connect F_ to OUT if this LED is not populated.

11–16

M6–M1

30mA Main LED Cathode Connection and Charge-Pump Feedback. Current flowing into M_ is based on the

any M_ forces OUT to operate at approximately 5V. Connect M_ to OUT if this LED is not populated.

17

P2

Default Output-Voltage Select Input. P1 and P2 set the LDO1 and LDO2 voltages to one of nine

combinations (Table 2). P2 is high impedance in an off condition and shortly after an on condition.

18

ENLDO

LDO Output Enable. Drive to a logic-level high to turn on both LDOs. Drive to a logic-level low to turn

off both LDOs.

19

ENM2

Enable and Dimming Control for M1–M6. Drive both ENM1 and ENM2 to a logic-level high to turn on

the main LEDs. Drive both ENM1 and ENM2 to a logic-level low to turn off the main LEDs. Alternate

dimming techniques are discussed in the Applications Information section.

20

ENM1

Enable and Dimming Control for M1–M6. Drive both ENM1 and ENM2 to a logic-level high to turn on

the main LEDs. Drive both ENM1 and ENM2 to a logic-level low to turn off the main LEDs. Alternate

dimming techniques are discussed in the Applications Information section.

21

ENF

Enable and Dimming Control for F1, F2. Drive ENF to a logic-level high to turn on the flash LEDs.

Drive ENF to a logic-level low to turn off the flash LEDs. Dimming techniques are discussed in the

Applications Information section.

22

C1N

Transfer Capacitor 1 Negative Connection. Connect a 1µF ceramic capacitor between C1P and C1N.

C1N is internally shorted to IN during shutdown.