SC173AEVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC173AEVB
Semtech Corporation
'SC173AEVB' PDF : 26 Pages View PDF
SC173A
Absolute Maximum Ratings
Recommended Operating Conditions
LX to GND(3)……………………… - 0.3(DC) to +6.0V(DC) Max
VIN to PGND, EN to AGND …………………… -0.3 to +6.0V
BST to LX ………………………………………… -0.3 to +6.0V
BST to PGND…………………………………… -0.3 to +12V
VDD to AGND, VOUT to AGND ………………… -0.3V to +6.0V
FB, PGOOD, TON …………………………… -0.3 to VDD + 0.3V
AGND to PGND………………………………… -0.3 to +0.3V
Peak IR Reflow Temperature ……………….…………… 260°C
ESD Protection Level(2) ………………………………………1kV
Supply Input Voltage……………………………… 3V to 5.5V
Maximum Continuous Output Current …………………… 3A
Thermal Information
Storage Temperature …………………………… -60 to +150°C
Maximum Junction Temperature ……………………… 150°C
Operating Junction Temperature ……………… -40 to +125°C
Thermal Resistance, Junction to Ambient(1) ………… 40°C/W
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES-
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B
(3) Due to parasitic board inductance, the transient LX pin voltage at the point of measurement may appear larger than that which exists on
silicon. The device is designed to tolerate the short duration transient voltages that will appear on the LX pin due to the deadtime diode
conduction, for inductor currents up to the current limit setting of the device. See application section for details.
Electrical Characteristics
Unless specified: VIN =5V, TA=+25°C for Typ, -40°C to +85°C for Min and Max, TJ < 125°C
Parameter
Symbol
Conditions
Input Supplies
Min
Typ
Max Units
VIN, VDD Input Voltage
3
5.5
V
VDD UVLO Threshold
VDD UVLO Hysteresis
Rising UVLO VTH
2.75
2.85
2.98
V
100
200
mV
VIN, VDD Supply Current
Controller
FB On-Time Threshold
Frequency Programming Range
FB Input Bias Current
Timing
On-Time
Minimum On-Time(1)
Minimum Off-Time(1)
© 2010 Semtech Corporation
EN= 0V
IOUT=0A(1)
See RTON Calculation
FB=VDD or 0V
In Continuous Conduction
VIN=5V, VOUT=3V, RTON=200kΩ
5
15
μA
500
0.7425
0.75
0.7575
V
200
1000
kHz
-1
+1
μA
2.7
3
3.3
μs
80
ns
250
ns
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