MAX8550 Maxim Integrated Products, MAX8550 Datasheet - Page 5

• Manufacturer Part Number: MAX8550
• Description: (MAX8550 / MAX8551) Integrated DDR Power-Supply Solutions
• Manufacturer: Maxim Integrated Products

www.DataSheet.co.kr
ELECTRICAL CHARACTERISTICS (continued)
(V
= GND, PGND1 = PGND2 = LX = GND, TON = OPEN, V
are at T
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-
Note 3: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = GND, V
Note 4: Not applicable to the MAX8551.
LINEAR REGULATORS (VTTR AND VTT)
VTTI Input Voltage Range
VTTI Supply Current
VTTI Shutdown Current
REFIN Input Impedance
REFIN Range
REFIN Lockout Threshold
Soft-Start Charge Current
VTT Internal MOSFET High-Side
On-Resistance
VTT Internal MOSFET Low-Side
On-Resistance
VTT Output Accuracy
(Referred to V
VTT Load Regulation
VTT Current Limit
VTTS Input Current
VTTR Output Error
(Referred to V
VTTR Current Limit
IN
= +15V, V
A
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.
and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching speeds.
= +25°C.) (Note 1)
PARAMETER
Integrated DDR Power-Supply Solutions for
DD
REFIN
REFIN
= AV
Desktops, Notebooks, and Graphic Cards
_______________________________________________________________________________________
/ 2)
/ 2)
DD
= V
SHDNA
SYMBOL
= V
V
V
I
I
REFIN
VTTS
VTTI
I
SHDNB
VTTI
SS
= V
I
SHDNA = SHDNB = GND
V
V
Hysteresis
V
I
AV
I
V
V
V
VTT = 0 or VTTI
V
V
V
VTT
VTT
VTT
REFIN
REFIN
SS
REFIN
REFIN
REFIN
VTTS
REFIN
VTTR
BST
DD
= I
= 0
= -100mA, V
= 100mA, AV
= 4.5V
= V
= 1.5V, VTT open
= 0 or V
VTTR
= 2.5V
rising
= 1.5V or 2.5V, I
= 2.5V, I
= 1.5V, I
= 1.5V or 2.5V, I
VTTS
ILIM
= 0
= V
= 5V, V
VTTI
CONDITIONS
VTT
VTT
VTT
VTTI
DD
= 0 to ±1.5A
= 0 to ±1A
, T
= 4.5V
= 1.5V,
OUT
A
VTT
VTTR
= -40°C to +85°C, unless otherwise noted. Typical values
= V
= 1mA
= 0
REFIN
= V
VTTI
= 2.5V, UVP/OVP = STBY = FB = SKIP
MIN
±23
0.7
±3
12
-1
-1
1
1
<0.1
TYP
±40
±5
20
75
0.1
4
1
1
MAX
±6.5
±60
0.9
0.3
0.3
+1
+1
2.8
10
30
2.8
1
1
BST
UNITS
mA
mV
mA
kΩ
µA
µA
µA
= 5V,
%
%
%
Ω
Ω
V
V
V
A
5
Datasheet pdf - http://www.DataSheet4U.net/