MAX8538EEI+ Maxim Integrated Products, MAX8538EEI+ Datasheet - Page 4

• Manufacturer Part Number: MAX8538EEI+
• Description: IC CNTRLR BUCK DUAL 28-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX8538EEI+

• Applications: Controller, DDR
• Voltage - Input: 4.5 ~ 23 V
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Output Voltage: 0.8 V to 3.6 V
• Output Current: 30 A
• Input Voltage: 4.5 V to 23 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Case: SSOP
• Dc: 05+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual-Synchronous Buck Controllers for Point-of-
Load, Tracking, and DDR Memory Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 12V, EN_ = VL, BST_ = 6V, LX_ = 1V, VL load = 0mA, C
0V, C
otherwise noted.)
ELECTRICAL CHARACTERISTICS (Note 2)
(V+ = 12V, EN_ = VL, BST_ = 6V, LX_ = 1V, VL load = 0mA, C
0V, C
unless otherwise noted.)
Note 1: Operating supply range is guaranteed by the VL line-regulation test. User must short V+ to VL if a fixed 5V supply is used
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
4
REFIN Input Voltage Range
REFIN Undervoltage-Lockout Trip
Level
OUTPUT-VOLTAGE FAULT COMPARATORS
Upper FB2 Fault Threshold
Lower FB2 Fault Threshold
Upper FB1 Fault Threshold
Lower FB1 Fault Threshold
POWER-OK OUTPUT (POK_)
POK_ Delay
Upper FB2 POK_ Threshold
Lower FB2 POK_ Threshold
Upper FB1 POK_ Threshold
Lower FB1 POK_ Threshold
POK_ Output Low Level
POK_ Output High Leakage
V+ Operating Range
FB_ Input-Voltage Set Point
FB2 Input-Voltage Set Point
VTTR Output Accuracy
_______________________________________________________________________________________
SS
SS
= 10nF, C
(i.e., if V+ is less than 5.5V).
= 10nF, C
PARAMETER
PARAMETER
VTTR
VTTR
= 1µF, R
= 1µF, R
FREQ
FREQ
Rising and falling edge, hysteresis = 15mV
Rising voltage, hysteresis = 15mV
Falling voltage, hysteresis = 15mV
Rising voltage, hysteresis = 15mV
Falling voltage, hysteresis = 15mV
Rising voltage, hysteresis = 20mV
Falling voltage, hysteresis = 20mV
Rising voltage, hysteresis = 20mV
Falling voltage, hysteresis = 20mV
I
POK_ = 5.5V
VL regulator drops out below 5.5V (Note 1)
Over line and load
MAX8537/MAX8539, REFIN = 0.9V
-15mA < I
SINK
= 20kΩ, DH_ = open, DL_ = open, POK_ = open, circuit of Figure 1, T
= 20kΩ, DH_ = open, DL_ = open, POK_ = open, circuit of Figure 1, T
= 2mA
VTTR
≤ +15mA, REFIN = 0.9V or 1.25V
CONDITIONS
CONDITIONS
VL
VL
= 10µF (ceramic), REFIN = 1.25V, PGND = AGND = FB_ = ILIM_ =
= 10µF (ceramic), REFIN = 1.25V, PGND = AGND = FB_ = ILIM_ =
0.788
0.891
MIN
MIN
4.75
115
115
110
110
0.5
0.4
68
68
86
86
-1
REFIN
0.800
0.900
TYP
0.45
TYP
117
117
112
112
70
70
64
88
88
A
= 0°C to +85°C, unless
A
= -40°C to +85°C,
23.00
0.812
0.909
MAX
MAX
120
120
114
114
2.5
0.5
0.4
+1
72
72
90
90
1
UNITS
UNITS
REFIN
REFIN
cycles
REFIN
REFIN
Clock
% of
% of
% of
0.8V
% of
0.8V
% of
% of
% of
0.8V
% of
0.8V
µA
%
V
V
V
V
V
V