SC414MLTRT Semtech, SC414MLTRT Datasheet - Page 12

• Manufacturer Part Number: SC414MLTRT
• Description: IC BUCK SYNC ADJ 6A 28MLPQ
• Manufacturer: Semtech
• Series: SmartDrive™r
• Type: Step-Down (Buck)r

Specifications of SC414MLTRT

• Mfg Application Notes: SC414 Basic Design Procedure
• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.75 ~ 5.5 V
• Current - Output: 6A
• Frequency - Switching: 200kHz ~ 1MHz
• Voltage - Input: 3 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-MLPQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC414MLTR

Pin Descriptions
13, 14, 16-19
3, 26, PAD 1
15,20, 21,
5, 8-11
Pin #
PAD 2
PAD 3
12
22
23
24
25
27
28
1
2
4
6
7
Pin Name
PGOOD
EN/PSV
AGND
LXBST
PGND
VOUT
VLDO
ILIM
TON
V5V
ENL
BST
LXS
VIN
FB
LX
Feedback input for switching regulator used to program the output voltage — connect to an external resis-
tor divider from VOUT to AGND.
Bias input for internal analog circuits and gate drives — connect to external 3V or 5V supply or bias connec-
tion to VLDO.
Analog ground
Switcher output voltage sense pin, and also the input to the internal switch-over between VOUT and VLDO.
Input supply voltage
5V LDO output
Bootstrap pin — connect a capacitor from BST to LXBST to develop the fl oating supply for the high-side gate
drive.
LX Boost — connect to the BST capacitor.
Switching (phase) node
Power ground
Open-drain power good indicator — high impedance indicates power is good. An external pull-up
resistor is required.
Current limit sense pin — used to program the current limit by connecting a resistor from ILIM to LXS.
LX sense — connects to RILIM resistor
Enable/power save input for the switching regulator — connect to AGND to disable the switching regula-
tor. Float to operate in forced continuous mode (power save disabled). For SC414, connect to V5V to operate
with ultrasonic power save mode enabled. For SC424, connect to V5V to operate with power save mode
enabled with no minimum frequency.
On-time programming input — set the on-time by connecting through a resistor to AGND
Enable input for the LDO — connect ENL to AGND to disable the LDO. Drive with logic to +3V for logic con-
trol, or program the VIN UVLO with a resistor divider between VIN, ENL, and AGND.
Pin Function
SC414/SC424
12