SC418ULTRT Semtech, SC418ULTRT Datasheet - Page 4

• Manufacturer Part Number: SC418ULTRT
• Description: IC BUCK SYNC ADJ 20MLPQ
• Manufacturer: Semtech
• Series: EcoSpeed™, SmartDrive™r
• Type: Step-Down (Buck)r

Specifications of SC418ULTRT

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.5 ~ 5.5 V
• Frequency - Switching: 200kHz ~ 1MHz
• Voltage - Input: 3 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-MLPQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Other names: SC418ULTRTTR

Electrical Characteristics (continued)
Parameter
Input Supplies (continued)
VDDA + VDDP Supply Current
FB Comparator Threshold
Frequency Range
Timing
On-Time
Minimum On-Time
Minimum Off-Time
Ultrasonic Frequency
Soft-Start
Soft-Start Ramp Time
Analog Inputs/Outputs
VOUT Input Resistance
Current Sense
Zero Cross Detector Threshold
Power Good
Power Good Threshold
Start-Up Delay Time
Fault (noise immunity) Delay Time
Leakage
(2)
(2)
(2)
(2)
(2)
Operating f
Includes Soft-Start Ramp Time, VDDA = 3.3V
V
Minimum switching frequency, R
Upper limit, V
Lower limit, V
Includes Soft-Start Ramp Time, VDDA = 5V,
IN
V
EN = 5V, PSV = open (float), V
OUT
= 15V, V
Forced continuous mode operation,
EN = 5V, R
PGOOD = high impedance (open)
ramp from zero to programmed value
Static VIN and load, -40 to +85 °C
Static VIN and load, 0 to +85 °C
Continuous mode operation
SW
OUT
LX - PGND, VDDA = 5V
= 250kHz, PSV = VDDA, no load
= 5V, R
FB
FB
PSV
VDDA < 4.5V
VDDA = 3.3V
Conditions
ENL , EN = 0V
> internal 500mV reference
< internal 500mV reference
= 115kΩ, V
TON
= 300kΩ, VDDA = 5V
(4)
FB
(3)
> 500mV
FB
> 500mV
PSV
= 115kΩ
(2)
(2)
(2)
(2)
0.496
0.495
2385
Min
n/a
-3
0.500
2650
Typ
250
850
500
+20
n/a
-10
1.5
0.4
10
80
25
3
0
2
1
5
0.504
0.505
Max
1000
2915
n/a
+3
7
1
Units
kHz
kHz
mA
mV
ms
μA
kΩ
µA
ns
ns
ns
μs
µs
%
%
V
V
4