MAX8822 Maxim Integrated Products, MAX8822 Datasheet - Page 9

• Manufacturer Part Number: MAX8822
• Description: Ultra-Efficient Negative Charge-Pump LED Driver
• Manufacturer: Maxim Integrated Products

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Figure 3. MAX8822 Functional Block Diagram and Application Circuit
Driver with Dual LDOs in 3mm x 3mm Thin QFN
INPUT
2.7V
5.5V
Ultra-Efficient Negative Charge-Pump LED
TO
_______________________________________________________________________________________
4.7μF
0.1μF
V
C1
IN
C2
ENLDO
ENLED
GND
REF
IN
BANDGAP
REF
C1P
INTERFACE
CONTROL
SERIAL-
PULSE
1μF
C3
INDEPENDENT,
REGULATORS
MAX8822
ADAPTIVE
0.5x INVERTING CHARGE PUMP
CURRENT
C1N
SHUTDOWN
THERMAL
UVLO,
C2P
CURRENT
CONTROL
CONTROL
VOLTAGE
LED
1μF
LDO
C4
C2N
EP
NEG
2.2μF
C5
NEG
NEG
LOW-DROPOUT
REGULATORS
LINEAR
SEL MIN
LED1
LED2
LED3
LED4
LDO2
LDO1
V
IN
C6
1μF
C7
1μF
D4
D1
D2
D3
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