SC3102 PDF даташит
Спецификация SC3102 изготовлена «Semtech» и имеет функцию, называемую «2A Synchronous Step-Down Regulator». |
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Детали детали
Номер произв | SC3102 |
Описание | 2A Synchronous Step-Down Regulator |
Производители | Semtech |
логотип |
17 Pages
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POWER MANAGEMENT
Features
VIN Range: 2.9 – 5.5V
Preset VOUT Range: 1.0V to 3.3V
Up to 2A Output Current
Ultra-Small Footprint, <1mm Height
1.5MHz Switching Frequency
Selectable Forced PSAVE or Forced PWM Operation
Efficiency Up to 95%
Low Output Noise Across Load Range
Excellent Transient Response
Start Up into Pre-Bias Output
100% Duty-Cycle Low Dropout Operation
<1μA Shutdown Current
Externally Programmable Soft-Start Time
Power Good indicator
Input Under-Voltage Lockout
Output Over-Voltage, Current Limit Protection
Over-Temperature Protection
3mm x 3mm x 0.6mm thermally enhanced
MLPQ-UT16 package
-40 to +85°C Temperature Range
Pb-free, Halogen free, and RoHS/WEEE compliant
Applications
Office Automation
Switches and Routers
Network Cards
LCD TV
SC3102
2A Synchronous
Step-Down Regulator
Description
The SC3102 is a 2A synchronous step-down regulator
designed to operate with an input voltage range of 2.9V
to 5.5V.The device requires minimal external components
for a complete step down regulator solution. The output
voltage is factory predetermined with an available range
of 1.0V to 3.3V.
The SC3102 is optimized for maximum efficiency over a
wide range of load currents. During full load operation,
the SC3102 operates in forced PWM mode with a fixed
1.5MHz oscillator frequency, allowing the use of small
surface mount external components. As the load
decreases, the regulator has the option to transition, via
the MODE pin, into forced Power Save mode to maximize
efficiency or to stay in forced PWM mode.
The SC3102 offers output short circuit and thermal
protection to safe guard the device under extreme
operating conditions. The enable pin provides on/off
control of the regulator. When connected to logic
low, the device enters shutdown and consumes less
than 1μA of current. Other protection features include
programmable soft-start with Power Good indicator, over
voltage protection and under voltage lockout.
The SC3102 is available in a thermally-enhanced, 3mm
x 3mm x 0.6mm MLPQ-UT16 package and has a rated
temperature range of -40 to +85°C.
Typical Application Circuit
VIN
CIN
10μF
1Ohm
0.1μF
PVIN
LX
AVIN
VOUT
SC3102
PGOOD
EN
MODE
SS
PGND
AGND
CSS
L 1.5μH
VOUT
COUT
47μF
Rev 2.2
© Semtech Corporation
1
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SC3102
Pin Configuration
16
PVIN 1
PVIN 2
AGND 3
AVIN 4
15 14 13
TOP VIEW
12 PGND
11 PGND
10 VOUT
T
9 SS
5 678
Ordering Information
Device
SC3102xULTRT(2)(3)(4)
Package
3mm x 3mm x 0.6mm MLPQ-UT16
SC3102xEVB(5)
Evaluation Board
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) Available in tape and reel only. A reel contains 3,000 devices.
(3) Device is Pb-free, Halogen free, and RoHS/WEEE compliant.
(4) “x” is the code of the output voltage. See Table 1 for the code. For
example, the device number for VOUT= 1.50V is SC3102HULTRT.
(5) “x” is the code of the output voltage. See Table 1 for the code. For
example, the EVB with VOUT= 1.50V is SC3102HEVB.
3mm x 3mm x 0.6mm MLPQ-UT16
θJA = 40°C/W (1); θJC = 7°C/W
Marking Information
102X
yyww
nnnn
Table 1: Available Output Voltages
Code
VOUT(6)
D 1.10
E 1.20
H 1.50
Notes:
(6) Contact Semtech marketing for alternative output voltage
options.
Marking for 3mm x 3mm MLPQ-UT 16 Lead Package:
x = Code of the output voltage (Example: H for VOUT=1.50V)
yyww = Datecode (Example: 0852)
nnnn = Semtech Lot number (Example: E901)
2
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SC3102
Absolute Maximum Ratings
PVIN and AVIN Supply Voltages ………………… -0.3 to 6.0V
LX Voltage(9) …………………… -0.3 to PVIN+0.3V, 6V Max
VOUT Voltage …………………………… -0.3 to AVIN+0.3V
CTLx pins Voltages ……………………… -0.3 to AVIN+0.3V
Peak IR Reflow Temperature …………………………. 260°C
ESD Protection Level(8) …………………………………. 2kV
Recommended Operating Conditions
Supply Voltage PVIN and AVIN …………………… 2.9 to 5.5V
Maximum DC Output Current ………………………… 2.0A
Maximum DC Output Current in Forced PSAVE Mode … 0.35A
Temperature Range …………………………… -40 to +85˚C
Input Capacitor ……………………………………… 10μF
Output Capacitor ……………………… 47μF (or 2 x 22μF)
Output Inductor ……………………………………… 1.5 μH
Thermal Information
Thermal Resistance, Junction to Ambient(7) ………… 40 °C/W
Thermal Resistance, Junction to Case …………… 7 °C/W
Maximum Junction Temperature …………………… +150°C
Storage Temperature Range ………………… -65 to +150 °C
Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the
parameters specified in the Electrical Characteristics section is not recommended.
Notes:
(7) 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.
(8) Tested according to JEDEC standard JESD22-A114-B.
(9) 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.
Electrical Characteristics
Unless specified: PVIN= AVIN= 5.0V, VOUT= 1.50V, CIN= 10μF, COUT= 2 x 22μF; L= 1.5μH; -40°C≤ TJ ≤ +125 °C; Unless otherwise noted typical values are TA= +25 °C.
Parameter
Symbol
Conditions
Min Typ Max Units
Under-Voltage Lockout
Output Voltage Tolerance(10)
Current Limit
Supply Current
Shutdown Current
High Side Switch Resistance(11)
Low Side Switch Resistance(11)
LX Leakage Current(11)
Load Regulation
Oscillator Frequency
Soft-Start Charging Current(11)
Foldback Holding Current
UVLO
ΔVOUT
ILIMIT
IQ
ISHDN
RDSON_P
RDSON_N
ILK(LX)
ΔVLOAD-REG
fOSC
ISS
ICL_HOLD
Rising AVIN, PVIN=AVIN
Hysteresis
PVIN= AVIN= 2.9 to 5.5V; IOUT=0A
Peak LX current
No load, MODE= High
No load, MODE= Low
EN= AGND
ILX= 100mA, TJ= 25 °C
ILX= -100mA, TJ= 25 °C
PVIN= AVIN= 5.5V; LX= 0V; EN= AGND
PVIN= AVIN= 5.5V; LX= 5.0V; EN= AGND
PVIN= AVIN= 5.0V, MODE=High, IOUT=1mA to 2A
Average LX Current
2.70 2.80 2.90
V
300 mV
-1.25
+1.25 %
2.5 3.0 3.75
A
12 mA
60 μA
1 10 μA
50 85
mΩ
35 60
1 10
μA
-20 -1
±0.3 %
1.275 1.5 1.725 MHz
+5 μA
1A
3
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