MAX1977EEI+ Maxim Integrated Products, MAX1977EEI+ Datasheet - Page 15
![IC CNTRLR PS QUAD HI EFF 28QSOP](/photos/6/61/66154/28-qsop_21-0055_sml.jpg)
MAX1977EEI+
Manufacturer Part Number
MAX1977EEI+
Description
IC CNTRLR PS QUAD HI EFF 28QSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1977EEIT.pdf
(32 pages)
Specifications of MAX1977EEI+
Applications
Controller, Notebook Computers
Voltage - Input
4.5 ~ 24 V
Number Of Outputs
4
Voltage - Output
3.3V, 5V, 2 ~ 5.5 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-QSOP
Output Voltage
3.3 V, 2 V to 5.5 V
Input Voltage
6 V to 24 V
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Case
SSOP
Dc
06+
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Figure 2. MAX1999 Typical Application Circuit
10µF
C5
5V
*OPTIONAL CAPACITANCE BETWEEN
LX AND PGND (CLOSE TO THE IC) ONLY
REQUIRED FOR ULTRASONIC MODE
Supply Controllers for Notebook Computers
High-Efficiency, Quad Output, Main Power-
EP10QY03
L5
______________________________________________________________________________________
FDS6612A
D3
V
IN
7V TO 24V
4.7µF
N1
ON
4Ω
V
REF
OFF
N2
IRF7811AV
CC
1/2
D1
0.1µF
470pF*
SWITCHING FREQUENCY
10Ω
5V/3.3V SMPS
0.1µF
0.22µF
C3
C5
L3
L5
FREQUENCY-DEPENDENT COMPONENTS
V+
BST5
DH5
LX5
DL5
OUT5
FB5
SHDN
ON5
ON3
GND
REF
LDO5
MAX1999
200kHz/300kHz
ILIM3
TON = V
470µF
330µF
4.7µH
7.6µH
LDO3
CC
3.3V ALWAYS ON
V
4.7µF
CC
PGOOD
50Ω
ILIM5
OUT3
BST3
SKIP
DH3
TON
PRO
DL3
LX3
FB3
400kHz/500kHz
TON = GND
220µF
150µF
3.0µH
5.6µH
SEE
TABLE
CMPSH-3A
10Ω
0.1µF
IRF7811AV
1µF
V
CC
1/2
D1
N4
470pF*
100kΩ
1MΩ
1µF
N3
FDS6612A
5V ALWAYS ON
D2
EP10QY03
4.7µF
10µF
L3
3.3V
10µF
C3
15