MAX8821 MAXIM [Maxim Integrated Products], MAX8821 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS (continued)
(V
Typical values are at T
Soft-Start Time
Regulation Voltage
Open-Loop NEG Output
Resistance
Output Current
NEG Discharge Resistance in
Shutdown
LED_ CURRENT REGULATORS
Current Setting Range
Current Accuracy
Current-Derating-Function Start
Temperature
Current-Derating-Function Slope
R
Dropout Voltage
Current Regulator
Switchover Threshold
Current Regulator
Switchover Hysteresis
Leakage Current in Shutdown
Off Blink Time
On Blink Time
Ramp-Up/Down Time
IN1
DS ON
= V
IN2
PARAMETER
White LED Charge Pump with Mono Class D
= V
IN3
= V
_______________________________________________________________________________________
A
DD
= +25°C.) (Note 1)
= 3.6V, V
AGND
(V
(0.5 x V
V
All LEDs disabled
I
25.6mA setting
0.1mA setting, T
T
Charge pump inactive
Charge pump active
25.6mA setting (Note 2)
Charge pump inactive to active,
V
All LEDs
disabled
B7, B6 or B3, B2,
SYNC = 0,
Table 11
B5, B4 or B1, B0,
SYNC = 0,
Table 11
LED__RU: B7, B6 or B3, B2
LED__RD: B5, B4 or B1, B0
SYNC = 0,
Tables 8, 9, 10 (Note 3)
LED
A
IN1
LED_
IN1
= +40°C to +85°C
_
= 3.2V, LED V
= V
- V
falling
IN1
NEG
PGND1
- V
)
NEG
= V
A
) / I
= +25°C
FMAX
PGND2
NEG
CONDITIONS
= 3.9V
= 0V, circuit of Figure 2, T
T
T
function start temperature
(enabled by I
Charge pump inactive
Charge pump active
T
T
Audio Amp and Dual LDO
A
A
A
A
= +25°C
= -40°C to derating
= +25°C
= +85°C
2
C)
00
01
10
11
00
01
10
11
00
01
10
11
A
= -40°C to +85°C, unless otherwise noted.
MIN
154
125
-30
0.1
-2
-5
-1.67
1048
2097
4194
1048
2097
TYP
1.75
0.01
+40
120
150
100
524
131
262
524
262
524
0.1
2.3
0.1
±1
±5
10
72
66
5
5
MAX
25.6
+30
120
360
175
3.5
4.6
+2
+5
14
1
UNITS
%/°C
mA
mA
mV
mV
mV
ms
kΩ
ms
ms
ms
°C
µA
%
Ω
Ω
V
3