MAX1536ETI+ Maxim Integrated Products, MAX1536ETI+ Datasheet - Page 6

• Manufacturer Part Number: MAX1536ETI+
• Description: IC PWM STEP-DN DC-DC CONV 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of MAX1536ETI+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 5.5 V
• Current - Output: 3.6A
• Frequency - Switching: 1.4MHz
• Voltage - Input: 3 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: 28-TQFN Exposed Pad
• Voltage - Supply: 3 V ~ 5.5 V
• Frequency-max: 1.4MHz
• Duty Cycle: 100%
• Pwm Type: Current Mode
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
Down Regulator with Dynamic Output Voltage Control
6
(MAX1536 Circuit of Figure 1, T
_______________________________________________________________________________________
1.806
1.804
1.802
1.800
1.798
1.796
1.794
100
90
80
70
60
50
40
30
20
10
0
25
20
15
10
0.001
5
0
0.001
3.0
OUTPUT VOLTAGE vs. OUTPUT CURRENT
R
EFFICIENCY vs. OUTPUT CURRENT
TOFF
vs. INPUT VOLTAGE (PWM MODE)
PWM MODE
NO-LOAD SUPPLY CURRENT
(V
= 75kΩ
0.01
I
(V
0.01
IN
IN
3.5
OUTPUT CURRENT (A)
IN
= 3.3V, V
OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
= 3.3V, L = 1.2µH)
A
= +25°C, unless otherwise noted.)
IDLE MODE
0.1
0.1
4.0
OUT
= 1.8V)
L = 1.5µH
R
f
L = 0.8µH
R
f
SW
SW
L = 3.3µH
R
f
TOFF
TOFF
SW
TOFF
PWM MODE
1
≈ 500kHz
≈ 1000kHz
IDLE MODE
4.5
V
I
≈ 250kHz
1
CC
OUT
= 85kΩ
= 41.2kΩ
= 178kΩ
MAX1536 toc08
= 1.8V
Typical Operating Characteristics (continued)
10
5.0
10
1.0
0.8
0.6
0.4
0.2
0
100
1000
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
SWITCHING FREQUENCY vs. OUTPUT CURRENT
90
80
70
60
50
40
30
20
10
900
800
700
600
500
400
300
200
100
0
0
0.001
3.0
0
EFFICIENCY vs. OUTPUT CURRENT
vs. INPUT VOLTAGE (IDLE MODE)
(V
NO-LOAD SUPPLY CURRENT
V
OUT
0.01
IN
1
V
3.5
IN
= 3.3V
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
= 5.0V
I
= 1.8V, f
INPUT VOLTAGE (V)
IN
2
0.1
4.0
V
L = 3.3µH
R
IN
TOFF
SW
= 5V
3
= 300kHz)
= 221kΩ
V
L = 2.2µH
R
IN
TOFF
PWM MODE
4.5
PWM MODE
= 3.3V
1
IDLE MODE
V
IDLE MODE
V
I
CC
OUT
OUT
= 147kΩ
4
MAX1536 toc09
= 1.8V
= 1.8V
5.0
10
5
350
345
340
335
330
325
320
315
310
305
300