MAX1536ETI+ Maxim Integrated Products, MAX1536ETI+ Datasheet - Page 5

• 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

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
Note 2: Guaranteed by design and not production tested.
Note 3: To limit input surge currents, the current-limit threshold is set to 25% of its final value (25% x 4.8A = 1.2A) when the
Note 4: The upper and lower PGOOD thresholds are expressed as a ratio of V
Note 5: Specifications to -40°C are guaranteed by design and are not production tested.
(MAX1536 Circuit of Figure 1, T
INPUTS AND OUTPUTS
Logic Input Threshold
FBLANK Logic Thresholds
OD On-Resistance
OD On-Resistance
Down Regulator with Dynamic Output Voltage Control
100
90
80
70
60
50
40
30
20
10
0
0.001
MAX1536 is enabled or powered up. The current-limit threshold is increased by 25% every 256 LX cycles. The current-limit
threshold is at its final level of 4.8A after 768 LX cycles. See the Internal Soft-Start Circuit section.
PARAMETER
EFFICIENCY vs. OUTPUT CURRENT
PWM MODE
IDLE MODE
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
0.01
(V
OUTPUT CURRENT (A)
IN
= 5V, L = 1.5µH)
IN
_______________________________________________________________________________________
= V
0.1
CC
V
R
V
R
OUT
TOFF
OUT
TOFF
= V
V
R
OUT
TOFF
A
= 1.8V
= 0.7V
= 93.1kΩ
= 200kΩ
1
SHDN
SYMBOL
= +25°C, unless otherwise noted.)
V
= 2.5V
= 54.9kΩ
V
V
V
FBLANK
S HDN
R
R
GATE
S KIP
OD
O D
= +3.3V, V
,
10
,
SHDN, SKIP, GATE, V
rising edge, hysteresis = 100mV
SHDN, SKIP, GATE, V
rising edge, hysteresis = 100mV
FBLANK = V
FBLANK = REF
FBLANK = open
FBLANK = AGND
GATE = V
GATE = AGND
1.806
1.804
1.802
1.800
1.798
1.796
1.794
REFIN
0.001
OUTPUT VOLTAGE vs. OUTPUT CURRENT
CC
= +1.5V, SKIP = AGND, T
R
TOFF
CC
PWM MODE
= 93.1kΩ
V
0.01
(V
FB
CONDITIONS
V
OUTPUT CURRENT (A)
IN
-
REFIN
V
= 5V, L = 1.5µH)
IN
IN
REFIN
IDLE MODE
= V
= V
0.1
Typical Operating Characteristics
CC
CC
x
100%
= +3.3V,
= +5.0V,
1
FB
A
with respect to V
= -40°C to +85°C, unless otherwise noted.) (Note 5)
10
100
90
80
70
60
50
40
30
20
10
0
V
0.001
CC
1.15
MIN
REFIN
0.9
1.8
0.8
EFFICIENCY vs. OUTPUT CURRENT
- 0.2
.
0.01
(V
TYP
IN
OUTPUT CURRENT (A)
= 3.3V, L = 1.2µH)
0.1
V
R
OUT
TOFF
MAX
1.95
1.6
2.2
1.2
0.2
25
25
= 0.7V
V
R
= 165kΩ
OUT
TOFF
V
R
OUT
TOFF
= 1.8V
PWM MODE
1
= 75kΩ
IDLE MODE
UNITS
= 2.5V
= 42.2kΩ
Ω
Ω
V
V
10
5