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MAX1620EEE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
MAX1620/MAX1621
Digitally Adjustable LCD Bias Supplies
______________________________________________________________________________________ 19
___________________Chip Information
TRANSISTOR COUNT: 341
SUBSTRATE CONNECTED TO AGND
R1
360k
2V
TO
12V
BATT
POK
D1
MBRS0540+
Q1
MMBT4401LT1
Q1
MMBT2907
V
DD
POL
SHDN (SUS)
DN (SDA)
UP (SCL)
REF
AGND
3
5
11
7
4
1
2
6
12
( ) ARE FOR MAX1621.
NOTE: CONNECTIONS TO DIGITAL INPUTS NOT SHOWN.
14
16
15
13
R3
300k
RS
470Ω
R4
300k
R5
2.2M
C6
100pF
10
9
8
LX
DHI
DLO
PGND
DOUT
FB
LCDON
3V
TO
5.5V
C1
0.1µF
C2
0.1µF
R2
100k
C3
10µF
C5
10µF
12.5V
TO
23.5V OUT
VOUTSW
OPTIONAL
R6
150k
R7
150k
L1
220µH
MAX1620
MAX1621
U1
R8
10k
TO REF
D3 1N6263 (ANY SCHOTTKY)
Figure 10. Positive Output with Bipolar Switching Transistor
___________________________________________________Simplified Block Diagram
BIAS
SHDN
V
DD
AGND
DN (SDA)
UP (SCL)
SHDN (SUS)
POL
REF
FB
BATT
POK
( ) ARE FOR MAX1621 ONLY.
DOUT
LX
DHI
DLO
PGND
LCDON
DIGITAL
INTERFACE
BANDGAP
REFERENCE
5-BIT
DAC
1.0V
1.5V
ON-TIME
CONTROL
MAX1620
MAX1621
MAX1620/MAX1621
Digitally Adjustable LCD Bias Supplies
20 ______________________________________________________________________________________
________________________________________________________Package Information
QSOP.EPS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX1620EEE+

Mfr. #:
Buy MAX1620EEE+
Manufacturer:
Maxim Integrated
Description:
Power Management Specialized - PMIC Digitally Adjustable LCD Bias Supply
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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