MAX8821 MAXIM [Maxim Integrated Products], MAX8821 Datasheet - Page 5

• 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
Signal-to-Noise Ratio
Oscillator Frequency
(f
Differential Input
Resistance
Output Current Limit
Wake-Up Delay After
Short Circuit
LDO1
Output Voltage V
Maximum Output
Current
Output Current Limit
Dropout Voltage
Line Regulation
Load Regulation
Power-Supply
Rejection
ΔV
Output Voltage Noise
(RMS)
IN1
osc
IN3
PARAMETER
)
= V
/ΔV
IN2
LDO1
White LED Charge Pump with Mono Class D
= V
IN3
LDO1
= V
_______________________________________________________________________________________
A
DD
= +25°C.) (Note 1)
R
P
V
SW_MODE = 00
SW_MODE = 01
SW_MODE = 10
Shutdown mode only
SPK+, SPK- short circuited to PGND2 or to IN2
3.6V ≤ V
1mA ≤ I
V
I
V
I
I
10Hz to 10kHz,
I
100Hz to 100kHz,
I
LDO1
LDO1
LDO1
LDO1
LDO1
= 3.6V, V
OUT
IN2
LDO1
IN3
L
= 8Ω, f = 1kHz,
= V
stepped from 3.4V to 5.5V,
= 0.25W,
= 200mA, T
= 150mA
stepped from 1mA to 300mA
= 30mA
= 30mA
= 0V
LDO1
IN3
IN3
AGND
≤ 5.5V,
= 3.6V
≤ 300mA
= V
A
= +25°C (Note 5)
PGND1
Fixed-frequency mode (FFM)
Spread-spectrum mode (SSM)
FFM A weighted
SSM A weighted
= V
CONDITIONS
PGND2
= 0V, circuit of Figure 2, T
Audio Amp and Dual LDO
A
= -40°C to +85°C, unless otherwise noted.
1.164
1150
MIN
900
300
400
1.200
1100
1400
1250
TYP
±50
100
110
650
150
2.4
91
89
93
91
25
70
45
2
1.236
MAX
1300
1650
1000
300
UNITS
µV
kHz
mA
mA
mV
mV
mV
dB
kΩ
dB
µs
A
V
RMS
5