MAX8538EEI+ Maxim Integrated Products, MAX8538EEI+ Datasheet - Page 5

• 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

(Circuit of Figure 1, T
Load, Tracking, and DDR Memory Power Supplies
1.30
1.29
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
100
95
90
85
80
75
70
65
60
55
50
Dual-Synchronous Buck Controllers for Point-of-
1
0
V
V
DDQ
IN
V
= 12V
DDQ
EFFICIENCY vs. LOAD CURRENT
3
V
= 2.5V
TT
V
DDQ
LOAD CURRENT (A)
LOAD CURRENT (A)
vs. LOAD CURRENT
POWER-UP
= 1.8V
6
_______________________________________________________________________________________
A
4ms/div
= +25°C, 400kHz switching frequency, V
10
SENSE RESISTOR = 0Ω
9
V
12
IN
MAX8537 toc07
= 12V
100
15
V+
5V/div
V
1V/div
V
8.5V/div
V
8.5V/div
DDQ
TT
TTR
1.30
1.29
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
100
V
V
95
90
85
80
75
70
65
60
55
50
VTTR
DDQ
V
V
TT
IN
1
0
V
V
DDQ
IN
V
= 12V
DDQ
EFFICIENCY vs. LOAD CURRENT
V
5
= 2.5V
TTR
V
LOAD CURRENT (mA)
LOAD CURRENT (A)
DDQ
vs. LOAD CURRENT
POWER-DOWN
IN
10
= 1.8V
= 12V, unless otherwise noted.)
4ms/div
SENSE RESISTOR = 3mΩ
10
Typical Operating Characteristics
15
V
20
IN
MAX8537 toc08
= 12V
100
25
5V/div
2V/div
2V/div
2V/div
2.55
2.53
2.51
2.49
2.47
2.45
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
12
0
OUTPUT VOLTAGE vs. INPUT VOLTAGE
V
I
I
I
V
OUT
OUT
OUT
IN
TT
= 12V
_V
_V
_V
AND V
STARTUP AND SHUTDOWN
DDQ
TT
TTR
V
DDQ
5
= 12A
= 15mA
TTR
V
= 20A
DDQ
INPUT VOLTAGE (V)
LOAD CURRENT (A)
vs. LOAD CURRENT
1ms/div
10
13
15
MAX8537 toc09
20
14
EN1/EN2
5V/div
V
2V/div
V
1V/div
V
1V/div
5
DDQ
TT
TTR