MAX796 Maxim, MAX796 Datasheet - Page 11

• Manufacturer Part Number: MAX796
• Description: Step-Down Controllers with Synchronous Rectifier for CPU Power
• Manufacturer: Maxim

Table 1. Component Selection for Standard 3.3V Applications
Table 2. Component Suppliers
losses due to MOSFET gate charge. The step-down
power-switching circuit consists of two N-channel
MOSFETs, a rectifier, and an LC output filter. The out-
put voltage is the average of the AC voltage at the
switching node, which is adjusted and regulated by
changing the duty cycle of the MOSFET switches. The
* Distributor
Input Range
Application
Frequency
Q1 High-Side
MOSFET
Q2 Low-Side
MOSFET
C1 Input
Capacitor
C2 Output
Capacitor
D1 Rectifier
R1 Resistor
L1 Inductor
AVX
Central Semiconductor
Coilcraft
Coiltronics
Dale
International Rectifier
IRC
Kemet
Matsuo
Motorola
COMPONENT
MANUFACTURER
4.75V to 18V
PDA
150kHz
International Rectifier
1/2 IRF7101
International Rectifier
1/2 IRF7101
22µF, 35V AVX TPS
or Sprague 595D
150µF, 10V AVX TPS
or Sprague 595D
1N5817 Motorola
MBR0502L SOD-89
0.062Ω IRC
LR2010-01-R062
47µH, 1.2A Ferrite or
Kool-Mu
Sumida CD75-470
______________________________________________________________________________________
1A
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
Synchronous Rectifier for CPU Power
USA PHONE
4.75V to 18V
Sub-Notebook
300kHz
Motorola 1/2
MMDF3N03HD or 1/2
Si9936
Motorola 1/2
MMDF3N03HD or 1/2
Si9936
2 x 22µF, 35V AVX
TPS or Sprague 595D
150µF, 10V AVX TPS
or Sprague 595D
1N5817 NIEC
EC10QS02L or
Motorola MBRS130T3
0.039Ω IRC
LR2010-01-R039
33µH, 2.2A Ferrite
Dale LPE6562-330MB
[1] 803-626-3123
[1] 516-435-1824
[1] 847-639-1469
[1] 561-241-9339
[1] 605-665-1627
[1] 310-322-3332
[1] 512-992-3377
[1] 864-963-6521
[1] 714-960-6492
[1] 602-994-6430
[Country Code]
FACTORY FAX
2A
Step-Down Controllers with
4.75V to 28V
Notebook
300kHz
Motorola
MMSF5N03HD or
Si9410
Motorola
MMSF5N03HD or
Si9410
2 x 22µF, 35V AVX
TPS or Sprague 595D
220µF, 10V AVX TPS
or Sprague 595D
1N5819 NIEC
EC10QS03 or
Motorola MBRS130T3
0.025Ω IRC
LR2010-01-R025
10µH, 3A Ferrite
Sumida CDRH125
LOAD CURRENT
gate-drive signal to the N-channel high-side MOSFET
must exceed the battery voltage and is provided by a
flying capacitor boost circuit that uses a 100nF capaci-
tor connected to BST.
The MAX796 contains nine major circuit blocks, which
are shown in Figure 2.
Murata-Erie
NIEC
Sanyo
Siliconix
Sprague
Sumida
TDK
Transpower Technologies
MANUFACTURER
3A
4.75V to 24V
High-End Notebook
300kHz
Motorola
MTD20N03HDL
DPAK
Motorola
MTD20N03HDL
DPAK
4 x 22µF, 35V AVX
TPS or Sprague 595D
3 x 220µF, 10V AVX
TPS or Sprague 595D
1N5821 NIEC
NSQ03A04 or
Motorola MBRS340T3
0.015Ω IRC
LR2010-01-015
4.7µH, 5.5A Ferrite
Coilcraft DO3316-472
4A
[phone]
[phone]
[phone]*
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
USA PHONE
4.5V to 6V
Desktop 5V-to-3V
300kHz
Motorola
MTD75N03HDL
D
Motorola
MTD75N03HDL
D
2 x 220µF, 10V
Sanyo OS-CON
10SA220M
4 x 220µF, 10V
Sanyo OS-CON
10SA220M
1N5820 NIEC
NSQ03A02, or
Motorola MBRS340T3
3 x 0.02Ω IRC
LR2010-01-R020
(3 in parallel)
1.5µH, 11A, 3.5mΩ
Coiltronics
CTX03-12357-1
2
2
PAK
PAK
[1] 814-238-0490
[81] 3-3494-7414
[81] 7-2070-1174
[1] 408-970-3950
[1] 603-224-1430
[81] 3-3607-5144
{1} 847-390-4405
[1] 702-831-3521
[Country Code]
FACTORY FAX
10A
11