MAX8821 MAXIM [Maxim Integrated Products], MAX8821 Datasheet - Page 2

• Manufacturer Part Number: MAX8821
• Description: White LED Charge Pump with Mono Class D Audio Amp and Dual LDO
• Manufacturer: MAXIM [Maxim Integrated Products]

ABSOLUTE MAXIMUM RATINGS
IN1, IN2, IN3, V
SCL, SDA to AGND ....................................-0.3V to (V
IN1, IN2, IN3 to NEG .............................................-0.3V to +6.0V
AGND to C2N ........................................................-0.3V to +6.0V
C1P, C2P to AGND ....................................-0.3V to (V
LED_, C1N, C2N to NEG............................-0.3V to (V
LDO1, LDO2, REF to AGND ......................-0.3V to (V
CMREF, AIN+, AIN-, SPK+, SPK-
ELECTRICAL CHARACTERISTICS
(V
Typical values are at T
White LED Charge Pump with Mono Class D
Audio Amp and Dual LDO
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
V
Voltage
V
Undervoltage Lockout (UVLO)
Threshold
UVLO Hysteresis
V
IN1, IN2, IN3 Shutdown Supply
Current
(All Outputs Off)
No-Load Supply Current
Thermal Shutdown
Thermal-Shutdown Hysteresis
CHARGE PUMP
Switching Frequency
(f
to AGND..................................................-0.3V to (V
IN1
IN1
DD
DD
SW
_______________________________________________________________________________________
, V
)
= V
Operating Range
Shutdown Threshold
IN2
IN2
PARAMETER
, V
= V
IN3
DD
IN3
Operating
to AGND..................................-0.3V to +6.0V
= V
A
DD
= +25°C.) (Note 1)
= 3.6V, V
AGND
V
V
V
Charge pump inactive, 2 LEDs at 0.1mA setting, audio
amplifier disabled, LDO1 and LDO2 disabled
LED driver disabled, audio amplifier disabled, and LDO1
and LDO2 enabled
Charge pump active, 1MHz switching, all LEDs at
25.6mA setting, audio amplifier disabled, LDO1 and
LDO2 disabled
LED driver disabled, audio amplifier enabled, LDO1 and
LDO2 disabled
SYNC = 0
SYNC = 1, SW_MODE = 00
SYNC = 1, SW_MODE = 01
SYNC = 1, SW_MODE = 10
IN3
DD
DD
= AGND
= 3.6V
rising
= V
PGND1
IN1
IN1
IN3
IN2
DD
= V
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
PGND2
T
T
T
T
CONDITIONS
A
A
A
A
= +25°C
= +85°C
= +25°C
= +85°C
= 0V, circuit of Figure 2, T
IN1, IN2 to IN3.......................................................-0.3V to +0.3V
PGND1, PGND2 to AGND.....................................-0.3V to +0.3V
SPK+, SPK- Short Circuit to PGND2 or IN2 ...............Continuous
Continuous Power Dissipation (T
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
28-Pin, Thin QFN 4mm x 4mm
(derate 28.6mW/°C above +70°C) ..............................2286mW
A
= -40°C to +85°C, unless otherwise noted.
0.450
MIN
2.25
450
575
2.7
1.5
A
= +70°C)
0.865
+160
1000
± 25
TYP
2.45
1.50
100
170
550
700
625
0.1
0.1
6.6
70
20
2
2
1.350
MAX
2.65
4.00
120
250
650
825
5.5
5.5
10
20
1
UNITS
kHz
mV
mA
µA
µA
°C
°C
V
V
V
V