IC PWR SUPPLY DDR 28-TQFN

MAX8632ETI+T

Manufacturer Part NumberMAX8632ETI+T
DescriptionIC PWR SUPPLY DDR 28-TQFN
ManufacturerMaxim Integrated Products
MAX8632ETI+T datasheet
 


Specifications of MAX8632ETI+T

ApplicationsController, DDRVoltage - Input2 ~ 28 V
Number Of Outputs1Voltage - Output1.8V, 2.5V, 0.7 ~ 5.5 V
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case28-TQFN Exposed PadOutput Voltage1.8 V, 2.5 V, 0.7 V to 5.5 V
Output Current15 AInput Voltage2 V to 28 V
Mounting StyleSMD/SMTMaximum Operating Temperature+ 85 C
Minimum Operating Temperature- 40 CLead Free Status / RoHS StatusLead free / RoHS Compliant
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Integrated DDR Power-Supply Solution for
Desktops, Notebooks, and Graphic Cards
20Ω
VTTI
C2
10µF
VTT
VTT
1.25V / ±1.5A
C4
VTTS
20µF
PGND2
VTTR
VTTR
1.25V / 10mA
C6
1µF
OVP/UVP
R2
R3
100kΩ
100kΩ
POK1
POK1
POK2
POK2
SKIP
TON
GND
C9
3.9nF
SS
C10
0.22µF
REF
R4
R5
100kΩ
47.5kΩ
ILIM
FB
OUT
Figure 8. Typical Application Circuit
Transient Response (Buck)
The inductor ripple current also affects transient-
response performance, especially at low V
ferentials. Low inductor values allow the inductor
current to slew faster, replenishing charge removed
from the output filter capacitors by a sudden load step.
The output sag is also a function of the maximum duty
factor, which can be calculated from the on-time and
minimum off-time:
24
______________________________________________________________________________________
R6
C1
0.1µF
REFIN
C3
1µF
AV
DD
R1
MAX8632
10Ω
V
DD
C5
D1
4.7µF
CMDSH-3
V
IN
BST
C8
C7
2 x 10µF
0.22µF
LX
Q1
IRF7821
DH
n-CHANNEL
30V, 9mΩ
TOKO FDA1254-1R0M
1.0µH, 21A,
Q2
DL
IRF7832
n-CHANNEL
30V,5mΩ
PGND1
SHDN
ON
STBY
OFF
TP0
- V
dif-
=
IN
OUT
V
SAG
2
C
where t
OFF(MIN)
Electrical Characteristics) and K is from Table 1.
5V
BIAS
SUPPLY
V
(4.5V TO 28V)
IN
C14
470µF
(OPTIONAL)
L1
1.6mΩ
C12
150µF
C11
C13
150µF
1µF
C11, C12 (150µF, 4V,
25mΩ, LOW-ESR POS
CAPACITOR (D2E)
SANYO 4TPE150M
×
V
K
2
OUT
×
+
L
I
t
LOAD MAX
(
)
OFF MIN
V
IN
(
)
×
V
-
V
K
IN
OUT
×
+
V
t
OUT
OUT
OFF MIN
V
IN
is the minimum off-time (see the
2.5V / 12A
(
)
(
)