MAX8822 Maxim Integrated Products, MAX8822 Datasheet - Page 2

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

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ABSOLUTE MAXIMUM RATINGS
IN, C1N, C2N, REF, ENLED, ENLDO, LDO1, LDO2
IN, REF, ENLED, ENLDO, LDO1, LDO2
LED_, C1N, C2N to NEG .............................-0.3V to (V
C1P, C2P to GND ........................................-0.3V to (V
NEG to GND ..........................................................-6.0V to +0.3V
NEG, LDO1, LDO2 Short-Circuit Current to GND ......Continuous
ELECTRICAL CHARACTERISTICS
(V
Ultra-Efficient Negative Charge-Pump LED
Driver with Dual LDOs in 3mm x 3mm Thin QFN
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
IN Operating Voltage
Undervoltage Lockout (UVLO)
Threshold
UVLO Hysteresis
Shutdown Supply Current
IN Operating Supply Current
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
SERIAL-PULSE CONTROL
Logic Input-High Voltage (V
Logic Input-Low Voltage (V
Logic Input Current
t
t
t
t
t
CHARGE PUMP
Switching Frequency
Soft-Start Time
Charge-Pump Regulation Voltage
Open-Loop NEG Output
Resistance
NEG Shutdown Discharge
Resistance
SHDN
LO
HI
INIT
HOLD
IN
to GND...............................................................-0.3V to +6.0V
to NEG ...............................................................-0.3V to +6.0V
_______________________________________________________________________________________
= 3.6V, V
PARAMETER
GND
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
IL
IH
)
)
V
ENLED = ENLDO = GND
Charge pump inactive,
I
Charge pump active, V
I
V
V
V
See Figures 1 and 2 (Note 2)
See Figures 1 and 2
See Figures 1 and 2
First high pulse from shutdown (Figures 1 and 2)
Pulse width to latch EN_ count (Figures 1 and 2) (Note 3)
(V
(V
All LEDs off, EN_ = GND
LED1
LED1
IN
IN
IN
IL
IN
NEG
= 0V or V
rising
= 2.7V to 5.5V
= 2.7V to 5.5V
- V
= I
= I
- 0.5 x V
NEG
LED2
LED2
)
IH
= I
= I
IN
= 5.5V
LED3
IN
IN
LED3
) / I
+ 0.3V)
+ 0.3V)
NEG
CONDITIONS
= I
= I
IN
LED4
LED4
= 2.7V, 1MHz switching,
T
T
T
T
A
A
A
A
= 0.1mA
= 0.1mA
= +25°C
= +85°C
= +25°C
= +85°C
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
16-Pin Thin QFN 3mm x 3mm
(derate 14.7mW/°C above +70°C) .............................1177mW
A
= +25°C.) (Note 1)
MIN
2.25
100
2.5
2.7
1.4
2.5
0.5
0.5
A
= +70°C)
TYP
2.45
0.01
100
160
0.5
0.5
1.4
0.1
0.5
2.8
65
20
10
1
5
MAX
2.65
100
500
500
5.5
0.4
5.0
5
1
UNITS
MHz
mV
mA
ms
ms
ms
kΩ
µA
µA
°C
°C
µA
µs
µs
µs
Ω
V
V
V
V
V