Datasheet

MAX8632
Integrated DDR Power-Supply Solution for
Desktops, Notebooks, and Graphic Cards
4 _______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
MOSFET DRIVERS
DH Gate-Driver On-Resistance V
BST
- V
LX
= 5V 1 4 Ω
DL Gate-Driver On-Resistance in
High State
14Ω
DL Gate-Driver On-Resistance in
Low State
0.5 3 Ω
DH falling to DL rising 30
Dead Time (Additional to
Adaptive Delay)
DL falling to DH rising 50
ns
INPUTS AND OUTPUTS
Rising edge
1.20
1.7
2.20
V
Logic Input Threshold
(SHDN, STBY, SKIP)
Hysteresis
225
mV
Logic Input Current
(SHDN, STBY, SKIP)
-1 +1 µA
Low (2.5V output)
0.05
Dual-Mode™ Input Logic
Levels (FB)
High (1.8V output) 2.1
V
Input Bias Current (FB)
-0.1 +0.1
µA
High
AV
DD
-
0.4
Floating
3.15 3.85
REF
1.65 2.35
Four-Level Input Logic Levels
(TON, OVP/UVP)
Low 0.5
V
Logic Input Current
(TON, OVP/UVP)
-3 +3 µA
FB = GND 90
175
350
FB = AV
DD
70
135
270OUT Input Resistance
FB adjustable mode
400 800 1600
kΩ
OUT Discharge-Mode
On-Resistance
10 25 Ω
DL Turn-On Level During
Discharge Mode
(Measured at OUT)
0.01
0.1
0.20
V
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)
Dual Mode is a trademark of Maxim Integrated Products, Inc.