MAX1999EEI-T Maxim Integrated Products, MAX1999EEI-T Datasheet - Page 14

• Manufacturer Part Number: MAX1999EEI-T
• Description: DC/DC Switching Controllers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1999EEI-T

• Number Of Outputs: 1
• Output Voltage: 3.3 V, 2 V to 5.5 V
• Output Current: 0.95 A
• Input Voltage: 6 V to 24 V
• Mounting Style: SMD/SMT
• Package / Case: QSOP-28
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The typical application circuits (Figures 1 and 2) gener-
ate the 5V/5A and 3.3V/5A main supplies in a notebook
computer. The input supply range is 7V to 24V. Table 1
lists component suppliers.
The MAX1777/MAX1977/MAX1999 dual-buck, BiCMOS,
switch-mode power-supply controllers generate logic
supply voltages for notebook computers. The
MAX1777/MAX1977/MAX1999 are designed primarily
for battery-powered applications where high-efficiency
and low-quiescent supply current are critical.
The MAX1777 is optimized for highest efficiency with a
5V/200kHz SMPS and a 3.3V/300kHz SMPS, while the
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
Figure 1. MAX1777/MAX1977 Typical Application Circuit
14
______________________________________________________________________________________
SWITCHING FREQUENCY
5V/3.3V SMPS
C3
C5
L3
L5
Typical Application Circuit
FREQUENCY-DEPENDENT COMPONENTS
10µF
C5
5V
200kHz/300kHz
Detailed Description
MAX1777
470µF
330µF
4.7µH
7.6µH
EP10QY03
L5
D3
FDS6612A
V
IN
7V TO 24V
400kHz/500kHz
4.7µF
N1
MAX1977
3.0µH
5.6µH
220µF
150µF
R
20mΩ
ON
CS
4Ω
5
V
REF
OFF
N2
IRF7811AV
CC
1/2
D1
0.1µF
10Ω
0.1µF
0.22µF
V+
BST5
DH5
LX5
DL5
CS5
OUT5
FB5
SHDN
ON5
ON3
GND
REF
LDO5
MAX1777/
MAX1977
Table 1. Component Suppliers
Central Semiconductor
Dale-Vishay
Fairchild
International Rectifier
NIEC (Nihon)
Sanyo
Sprague
Sumida
Taiyo Yuden
TDK
ILIM3
MANUFACTURER
LDO3
3.3V ALWAYS ON
V
4.7µF
CC
PGOOD
50Ω
ILIM5
OUT3
BST3
SKIP
DH3
PRO
DL3
CS3
LX3
FB3
CMPSH-3A
10Ω
IRF7811AV
1µF
V
CC
1µF
1/2
D1
N4
0.1µF
100kΩ
1MΩ
516-435-1110
402-564-3131
408-721-2181
310-322-3331
805-843-7500
619-661-6835
603-224-1961
847-956-0666
408-573-4150
847-390-4461
PHONE
N3
FDS6612A
R
20mΩ
5V ALWAYS ON
CS
3
D2
EP10QY03
4.7µF
10µF
L3
FACTORY FAX
516-435-1824
402-563-6418
408-721-1635
310-322-3332
847-843-2798
619-661-1055
603-224-1430
847-956-0702
408-573-4159
847-390-4405
3.3V
10µF
C3