SC418ULTRT Semtech, SC418ULTRT Datasheet - Page 6

• 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)
Notes:
(1) VIN UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.
(2) Guaranteed by design.
(3) For VDDA less than 4.5V, the On-Time may be limited by the VDDA supply voltage and by V
(4) The Zero Cross Detector and the Power-Save and Ultrasonic Power-Save features are not supported for VDDA less than 4.5V.
(5) The ENL pin will enable the LDO with 1.0V typical. The ENL pin’s VIN ULVO function will disable the switcher unless the ENL pin exceeds the
(6) The switch-over threshold is the maximum voltage differential between the VLDO and VOUT pins which ensures that VLDO will internally
(7) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point.
Parameter
High-Side Driver (DH, BST, LX)
Peak Current
On Resistance
Rise Time
Fall Time
Propagation Delay
Shoot-thru Protection Delay
Bootstrap Switch Resistance
Low-Side Driver (DL, VDDP, PGND)
Peak Current
On Resistance
Rise Time
Fall Time
Voltage section in the Applications Information.
V
switch-over to VOUT. The non-switch-over threshold is the minimum voltage differential between the VLDO and VOUT pins which ensures
that VLDO will not switch-over to VOUT.
IN
UVLO Threshold.
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
From FB Comparator Input to DH
R
R
DH_PULL-UP,
DH_PULL-UP,
R
C
C
R
C
C
R
DH_PULL-DOWN,
DH-LX
DH-LX
DL_PULL-DOWN,
DL_PULL-UP,
DL
DL
= 3nF, VDDP = 5V
= 3nF, VDDP = 5V
Conditions
LX < 0.5V, VDDP = 5V
= 3nF, VDDP = 5V
= 3nF, VDDP = 5V
VDDP = 5V
LX > 0.5V, VDDP = 5V
VDDP = 5V
VDDP = 5V
VDDP = 5V
VDDP = 5V
IN
. See the TON Limitations and VDDA Supply
Min
30
10
Typ
0.50
2.0
3.0
1.0
0.6
4.0
1.3
3.5
22
12
45
20
10
7
Max
0.86
6.0
2.0
1.2
2.1
60
30
SC418
Units
ns
ns
ns
ns
ns
ns
Ω
Ω
Ω
Ω
Ω
Ω
A
A
6