參數(shù)資料
型號: MAX8632
廠商: Maxim Integrated Products, Inc.
英文描述: Quadruple 2-Input Positive-NAND Gates With Open-Drain Outputs 20-LCCC -55 to 125
中文描述: 集成DDR電源方案,適用于臺式機(jī)、筆記本電腦和圖形卡
文件頁數(shù): 5/29頁
文件大小: 512K
代理商: MAX8632
M
Integrated DDR Power-Supply Solution for
Desktops, Notebooks, and Graphic Cards
_______________________________________________________________________________________
5
Note 1:
Specifications to -40°C are guaranteed by design, not production tested.
Note 2:
When the inductor is in continuous conduction, the output voltage has a DC regulation level higher than the error-compara-
tor threshold by 50% of the ripple. In discontinuous conduction, the output voltage has a DC regulation level higher than the
trip level by approximately 1.5% due to slope compensation.
Note 3:
On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = GND, V
BST
= 5V,
and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching speeds.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LINEAR REGULATORS (VTTR AND VTT)
VTTI Input Voltage Range
VTTI Supply Current
VTTI Shutdown Current
REFIN Input Impedance
REFIN Range
V
VTTI
I
VTTI
1
2.8
1
10
30
2.8
V
I
VTT
= I
VTTR
= 0
SHDN
= GND
V
REFIN
= 2.5V
<0.1
mA
μA
k
V
12
1
20
V
REFIN
VTT, VTTR UVLO Threshold
(Measured at OUT)
0.01
0.1
0.20
V
Soft-Start Charge Current
I
SS
V
SS
= 0
I
VTT
= -100mA, V
VTTI
= 1.5V,
AV
DD
= 4.5V
4
μA
VTT Internal MOSFET High-Side
On-Resistance
0.3
VTT Internal MOSFET Low-Side
On-Resistance
I
VTT
= 100mA, AV
DD
= 4.5V
0.3
VTT Output Accuracy
(Referred to V
REFIN
/ 2)
V
REFIN
= 1.5V or 2.5V, I
VTT
= 1mA
-1
+1
%
V
REFIN
= 2.5V, I
VTT
= 0 to
±
1.5A
V
REFIN
= 1.5V, I
VTT
= 0 to
±
1A
VTT = 0 or VTTI
V
VTTS
= 1.5V, VTT open
1.3
1.3
±5
0.1
VTT Load Regulation
%
VTT Current Limit
VTTS Input Current
±3
±6.5
1
A
μA
I
VTTS
VTTR Output Error
(Referred to V
REFIN
/ 2)
VTTR Current Limit
VTTR Bias Current
V
REFIN
= 1.5V or 2.5V, I
VTTR
= 0
-1
+1
%
V
VTTR
= 0 or V
VTTI
V
REFIN
= V
VTTI
= 0
±18
±32
0.6
±50
4
mA
μA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +15V, V
DD
= AV
DD
= V
SHDN
=
STBY
= V
BST
= V
ILIM
= 5V, V
OUT
= V
REFIN
= V
VTTI
= 2.5V, UVP/OVP = TP0 = FB =
SKIP
= GND, PGND1 = PGND2 = LX = GND, TON = OPEN, V
VTTS
= V
VTT
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
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