SC418ULTRT Semtech, SC418ULTRT Datasheet - Page 7

• 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

Detailed Application Circuit
ENABLE LDO
5V
VIN
VLDO
COUT1, COUT2
Component
L1 (option 1)
L1 (option 2)
CIN1, CIN2
Q1
Q2
RTON
154kΩ
Note 1 - 5V: Connect VDDA/VDDP to external 3.3V or 5V supply for external bias
Note 2 - RPSV: Use 115kΩ for Ultrasonic operation
100nF
220µF/15mΩ/6.3V
100nF
0.88µH/2.3mΩ
Connect VDDA/VDDP to VLDO for self-biased operation
1.0µH/2.3mΩ
10µF/25V
IRF7821
IRF7832
Remove RPSV for Power-Save operation
Connect PSV pin to VDDA for Forced Continuous Mode operation
Value
1µF
2
4
5
3
1
PAD
FB
FBL
VDDA
VOUT
N/C
20
6
Manufacturer
19
NEC-Tokin
Panasonic
7
Key Components
Murata
Vishay
SC418
I.R.
I.R.
18
RLDO1
56.2kΩ
RLDO2
10kΩ
8
100nF
COUT1
17
9
10
16
PGOOD
GRM32DR71E106KA12L
IHLP4040DZER1ROM11
PGND
+
VDDP
L1
PSV
MPC1040LR88C
DL
Part Number
EEFUE0J221
IRF7821
IRF7832
COUT2
+
15
14
13
12
11
10nF
12V to 1.05V @ 10A, 250kHz
100pF
CFF
RPSV
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(2)
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10kΩ
RILIM
10kΩ
RFB1
11kΩ
RFB2
Q1
Q2
CIN1
1µF
PGOOD
VOUT
VIN
EN
5V
CIN2
7