Rainbow Electronics MAX8508 - Manual (Page 10)

MAX8506/MAX8507/MAX8508
PWM Step-Down DC-DC Converters with 75m Ω
Bypass FET for WCDMA and cdmaOne Handsets
10 ______________________________________________________________________________________
16 15 14 13
BATT OUT BATT
9
10
11
12
LX
BATTP
BATT
OUT
4
3
2
1
FB
REF
GND
5 6 7 8
COMP
HP
N.C.
PGND
SHDN
SKIP
THIN QFN
4mm x 4mm
16 15 14 13
BATT OUT BATT
9
10
11
12
LX
BATTP
BATT
OUT
4
3
2
1
REFIN
REF
GND
5 6 7 8
COMP
HP
N.C.
PGND
SHDN
SKIP
THIN QFN
4mm x 4mm
TOP VIEW
MAX8508
MAX8506
MAX8507
Pin Configurations
CURRENT-
LIMIT
CONTROL
PWM
BATTP LX
OUT
FB
COMP PGND GND
1MHz
OSC
REF
HP
INPUT
2.6V TO 5.5V 4.7µH
OUTPUT
0.75V TO 3.4V OR V BATT
4.7µF
0.3Ω
0.4Ω
0.075Ω
BATT
REF
2.2µF
0.22µF
SKIP
SHDN
R C
5.6kΩ
C C
2700pF
C f
100pF
MAX8508
0.75V
R1
R2
Typical Application Circuits (MAX8508) (continued)
Chip Information
TRANSISTOR COUNT: 2020
PROCESS: BiCMOS