MAX888ECJ Maxim, MAX888ECJ Datasheet - Page 15

• Manufacturer Part Number: MAX888ECJ
• Description: Wireless and Satellite Handset Power-Management ICs
• Manufacturer: Maxim

Table 3. MAX888 Output Voltage Settings
Note: The output voltage of each regulator can be set independently. The POR states are in boldface.
Table 4. Oscillator Frequency Setting
Note: The POR states are in boldface.
Table 5. OUT3 Output Voltage Setting
Note: The POR states are in boldface.
ADDRESS 03h DATA
VOUT2 (REG3 Off)
ADDRESS 03h
OUT5
0V (REG3 Off)
1.25
1.40
1.55
1.70
1.85
2.00
2.15
2.30
2.45
2.60
2.75
2.90
3.05
3.20
3.35
3.50
f
OSC
DATA
2.85V
4.65V
375
535
670
925
(kHz)
REGULATOR OUTPUT VOLTAGE (V)
______________________________________________________________________________________
OUT2
1.527
1.627
1.727
1.827
1.927
2.027
2.127
2.227
2.327
2.427
2.527
2.627
2.727
2.827
2.927
3.027
D3
D3
X
X
X
X
0
0
1
1
OUT1
D2
D2
X
X
X
X
1.25
1.40
1.55
1.70
1.85
2.00
2.15
2.30
2.45
2.60
2.75
2.90
3.05
3.20
3.35
3.50
0
1
0
1
Wireless and Satellite Handset
D1
D1
X
X
X
X
0
0
1
1
OUT0
1.527
1.627
1.727
1.827
1.927
2.027
2.127
2.227
2.327
2.427
2.527
2.627
2.727
2.827
2.927
3.027
D0
D0
X
X
X
X
0
1
0
1
Power-Management ICs
A low-battery comparator detects low-battery condi-
tions. The trip threshold is internally set to V
typ). LBHYS sets the hysteresis with external resistors.
LBO and LBHYS have open-drain outputs. The exter-
nally set low-battery threshold must be higher than the
UVLOF threshold (2.45V typical).
Set the threshold and hysteresis by connecting resis-
tors R1 (between BATT and LBI), R2 (between LBI and
LBHYS), and R3 (LBHYS and GND) (Figure 2).
After choosing the upper and lower thresholds, calcu-
late the resistor values as follows:
1) Choose a value for R1. Typical values range from
2) Calculate R2:
3) Calculate R3:
500kΩ to 1.5MΩ.
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
R3
R2 V
D2
R
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
THF
2
DACX DATA
V
REF
V
V
V
REF
Low-Battery Detector
THR
REF
R
V
1
THF
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
–
R1
1
V
REF
REF
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
(1.25V
15