MAX1999EEI+T Maxim Integrated Products, MAX1999EEI+T Datasheet - Page 10

• Manufacturer Part Number: MAX1999EEI+T
• Description: IC CNTRLR PS QUAD HI EFF 28QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1999EEI+T

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 4
• Voltage - Output: 3.3V, 5V, 2 ~ 5.5 V
• Current - Output: 10A
• Frequency - Switching: 200kHz, 300kHz, 400kHz, 550kHz
• Voltage - Input: 6 ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Power - Output: 860mW
• Output Voltage: 3.3 V, 2 V to 5.5 V
• Input Voltage: 6 V to 24 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
10
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V
R
5.00
4.99
4.98
4.97
4.96
4.95
3.3V
3.3V
CS
12V
5A
5A
5V
5V
2V
0
0
0
0
0
0
0
0
= 7mΩ, V
0
______________________________________________________________________________________
LDO5 REGULATOR OUTPUT VOLTAGE
REF, LDO3, AND LDO5 POWER-UP
10
SOFT-START WAVEFORMS
20 30 40
LDO5 OUTPUT CURRENT (mA)
vs. OUTPUT CURRENT
ILIM
_ = 0.5V, T
200µs/div
4ms/div
50 60 70
A
= +25°C, unless otherwise noted.)
80
MAX1777 toc25
MAX1777 toc22
90
100
I
5A/div
I
5A/div
OUT3
5V/div
OUT5
5V/div
V+
5V/div
LDO3
2V/div
LDO5
5V/div
REF
2V/div
L5
L3
3.350
3.348
3.346
3.344
3.342
3.340
3.338
3.336
3.334
3.332
3.330
3.3V
3.3V
Typical Operating Characteristics (continued)
5V
5V
5V
5V
5V
0
0
0
0
0
0
0
0
LDO3 REGULATOR OUTPUT VOLTAGE
SWITCHING
10
DELAYED START WAVEFORMS
SHUTDOWN WAVEFORMS
20 30 40
LDO3 OUTPUT CURRENT (mA)
vs. OUTPUT CURRENT
(ON3 = REF)
200µs/div
10ms/div
50 60 70
80
MAX1777 toc23
MAX1777 toc26
90
100
OUT3
2V/div
OUT5
2V/div
ON3
5V/div
OUT3
5V/div
OUT5
5V/div
DL3
5V/div
ON5
2V/div
2.005
2.004
2.003
2.002
2.001
2.000
1.999
1.998
1.997
1.996
1.995
3.3V
5V
5V
5V
4A
1A
5V
0
0
0
0
-10
0
MAX1777/MAX1999 (TON = V
DELAYED START WAVEFORMS
LOAD TRANSIENT RESPONSE
10 20
REFERENCE VOLTAGE
vs. OUTPUT CURRENT
5V PWM-MODE
30 40 50 60 70 80 90 100
(ON5 = REF)
200µs/div
I
20µs/div
REF
(µA)
CC
, SHDN = V+,
MAX1777 toc24
MAX1777 toc27
CC
)
OUT3
2V/div
OUT5
2V/div
ON3
2V/div
V
AC-
COUPLED
100mV/div
INDUCTOR
CURRENT
2A/div
DL5
5V/div
OUT
,