MAX8668ETEX+T Maxim Integrated Products, MAX8668ETEX+T Datasheet - Page 5

• Manufacturer Part Number: MAX8668ETEX+T
• Description: IC DC-DC CONV W/DUAL LDO 16TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX8668ETEX+T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 4
• Voltage - Output: 1.8V, 2.8V, 0.6 ~ 3.3 V (2)
• Current - Output: 600mA, 1.2A
• Frequency - Switching: 1.5MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Power - Output: 1.67W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
IN12
120
100
80
60
40
20
0
NO-LOAD SUPPLY CURRENT vs. SUPPLY
0
= V
VOLTAGE OUT3 AND OUT4 ONLY
IN34
V
FALLING
IN34
1
= 3.6V, circuit of Figure 4, V
VOLTAGE
1.5MHz Dual Step-Down DC-DC Converters
SUPPLY VOLTAGE (V)
EN1/EN2/
EN3/EN4
1000
2
V
V
V
V
900
800
700
600
500
400
300
200
100
OUT2
OUT3
OUT4
OUT1
0
V
RISING
_______________________________________________________________________________________
IN34
2.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
3
VOLTAGE
with Dual LDOs and Individual Enables
3.0
SHUTDOWN WAVEFORMS
V
4
IN12
SUPPLY VOLTAGE (V)
3.5
= 5.5V
5
40µs/div
4.0
IN12 = IN34
2.4Ω LOAD ON OUT1
3.6Ω LOAD ON OUT2
NO LOAD ON OUT3
NO LOAD ON OUT4
OUT1
4.5
= 1.2V, V
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
MAX8667/88 toc15
Typical Operating Characteristics (continued)
5.0
2.5
vs. INPUT VOLTAGE (300mA LOAD)
5.5
OUT2
3.0
5V/div
1V/div
1V/div
1V/div
1V/div
OUT3 OUTPUT VOLTAGE
= 1.8V, V
INPUT VOLTAGE (V)
3.5
4.0
OUT3
I
IN12
EN1/EN2/
4.5
EN3/EN4
= 2.8V, V
+ I
V
V
V
V
I
V
OUT1
OUT1
OUT2
OUT3
OUT4
OUT1
IN34
I
I
L1
I
L2
L1
5.0
10mA
OUT4
5.5
OUT1 LOAD TRANSIENT
ENABLE WAVEFORMS
= 2.8V, T
300mA
10µs/div
80
70
60
50
40
30
20
10
40µs/div
0
0
A
= +25°C, unless otherwise noted.)
OUT3 DROPOUT VOLTAGE
10mA
MAX8667/88 toc16
MAX8667/88 toc14
vs. LOAD CURRENT
LOAD CURRENT (mA)
100
100mV/div
(AC-COUPLED)
200mA/div
200mA/div
5V/div
2V/div
2V/div
2V/div
2V/div
2A/div
2A/div
2A/div
200
300
5