DatasheetsPDF.com

DC-DC Regulator. SC195 Datasheet

DatasheetsPDF.com

DC-DC Regulator. SC195 Datasheet






SC195 Regulator. Datasheet pdf. Equivalent




SC195 Regulator. Datasheet pdf. Equivalent





Part

SC195

Description

500mA Synchronous Step Down DC-DC Regulator



Feature


SC195 3.5MHz, 500mA Synchronous www.Data Sheet4U.com Step Down DC-DC Regulator P OWER MANAGEMENT Features „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ Description The SC195 is a high efficiency, 500mA step down regulator designed to operate with an input volta ge range of 2.9V to 5.5 V. Four control logic pins are used to select the outp ut voltage, eliminating the need for e.
Manufacture

Semtech

Datasheet
Download SC195 Datasheet


Semtech SC195

SC195; xternal feedback resistors. The control pins allow the output voltage to be set to a single level or controlled dynami cally. Fifteen different output voltage s can be selected. Pulling all four con trol pins low disables the output. The SC195 operates at a fixed 3.5MHz switch ing frequency, minimizing the size and cost of external components. A power-sa ve (PSAVE) mode is.


Semtech SC195

used to optimize efficiency at light lo ads for each output setting. Hysteresis is included to prevent chattering betw een PSAVE and normal pulse-width modula tion (PWM) mode. The SC195 provides sho rt-circuit and thermal protection to sa feguard the device under extreme operat ing conditions. Other features include internal soft-start circuitry, limiting in-rush current, .


Semtech SC195

and under-voltage lockout, preventing th e device from malfunction when the inpu t voltage drops below the rated minimum level. These features coupled with the tiny 1.5x1.5x0.6 (mm) package make the SC195 a versatile product well suited for portable applications. Input Volta ge — 2.9V to 5.5V Output Voltage — 0.8V to 3.3V Output current capability — 500mA Efficiency up .

Part

SC195

Description

500mA Synchronous Step Down DC-DC Regulator



Feature


SC195 3.5MHz, 500mA Synchronous www.Data Sheet4U.com Step Down DC-DC Regulator P OWER MANAGEMENT Features „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ Description The SC195 is a high efficiency, 500mA step down regulator designed to operate with an input volta ge range of 2.9V to 5.5 V. Four control logic pins are used to select the outp ut voltage, eliminating the need for e.
Manufacture

Semtech

Datasheet
Download SC195 Datasheet




 SC195
POWER MANAGEMENT
Features
„ Input Voltage — 2.9V to 5.5V
„ Output Voltage — 0.8V to 3.3V
„ Output current capability — 500mA
„ Efficiency up to 94%
„ 15 Programmable output voltages
„ High light-load efficiency via automatic PSAVE mode
„ Fast transient response
„ Temperature range — -40 to +85°C
„ Oscillator frequency — 3.5MHz
„ 100% duty cycle capability
„ Quiescent current — 38μA typ
„ Shutdown Current — 0.1μA typ
„ Internal soft-start
„ Over-voltage protection
„ Current limit and short circuit protection
„ Over-temperature protection
„ Under-voltage lockout
„ Floating control pin protection
„ MLPQ-UT8 1.5 x 1.5 x 0.6 (mm) package
„ Pb free, Halogen free, and RoHS/WEEE compliant
Applications
„ Smart phones and cellular phones
„ MP3/Personal media players
„ Personal navigation devices
„ Digital cameras
„ Single Li-ion cell or 3 NiMH/NiCd cell devices
„ Devices with 3.3V or 5V internal power rails
SC195
3.5MHz, 500mAwwSwy.DantacShheert4oU.ncoom us
Step Down DC-DC Regulator
Description
The SC195 is a high efficiency, 500mA step down regula-
tor designed to operate with an input voltage range of
2.9V to 5.5 V. Four control logic pins are used to select the
output voltage, eliminating the need for external feed-
back resistors. The control pins allow the output voltage
to be set to a single level or controlled dynamically.
Fifteen different output voltages can be selected. Pulling
all four control pins low disables the output.
The SC195 operates at a fixed 3.5MHz switching fre-
quency, minimizing the size and cost of external
components. A power-save (PSAVE) mode is used to opti-
mize efficiency at light loads for each output setting.
Hysteresis is included to prevent chattering between
PSAVE and normal pulse-width modulation (PWM)
mode.
The SC195 provides short-circuit and thermal protection
to safeguard the device under extreme operating condi-
tions. Other features include internal soft-start circuitry,
limiting in-rush current, and under-voltage lockout, pre-
venting the device from malfunction when the input
voltage drops below the rated minimum level. These fea-
tures coupled with the tiny 1.5x1.5x0.6 (mm) package
make the SC195 a versatile product well suited for porta-
ble applications.
Typical Application Circuit
VIN
2.9V to 5.5V
Control Logic
Lines
CIN
4.7μF
SC195
IN
LX
OUT
CTL3
CTL2
CTL1
CTL0
GND
LX
1.0μH
VOUT
0.8V to 3.3V
COUT
10μF
September 23, 2009
© 2009 Semtech Corporation
1




 SC195
Pin Configuration
CTL3
CTL2
CTL1
CTL0
8
17
TOP VIEW
26
3
4
5
IN
LX
GND
SC195
www.DataSheet4U.com
Ordering Information
Device
Package
SC195ULTRT(1)(2)
MLPQ-UT8 1.5x1.5
SC195EVB
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Pb free, Halogen free, and RoHS/WEEE compliant
OUT
MLPQ-UT8; 1.5x1.5, 8 LEAD
θ = 116°C/W
JA
Marking Information
0J
yw
0J = SC195
yw = Date code
Table 1 – Output Voltage Settings
CTL3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CTL2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CTL1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CTL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Vout
Shutdown
0.80
1.00
1.20
1.40
1.50
1.60
1.80
1.85
1.90
2.00
2.20
2.50
2.80
3.00
3.30
2




 SC195
SC195
www.DataSheet4U.com
Absolute Maximum Ratings
Recommended Operating Conditions
IN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
LX Voltage (V). . . . . . . . . . . . . . . . . . . . . . . . . . . .-1.0 to VIN +0.5
Other Pins (V). . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to VIN + 0.3
Output Short Circuit to GND. . . . . . . . . . . . . . . . Continuous
ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5
Input Voltage Range (V) . . . . . . . . . . . . . . . . . . . . . +2.9 to +5.5
Operating Temperature Range (°C) . . . . . . . . . . -40 to +85
Thermal Information
Thermal Resistance, Junction to Ambient(2) (°C/W). . . . 116
Junction Temperature Range (°C) . . . . . . . . . . . -40 to +150
Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150
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) Tested according to JEDEC standard JESD22-A114.
(2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Unless otherwise specified: V = 3.6V, C = 4.7μF, C =10μF, L =1μH, V =1.8V, T =125°C, T = -40 to +85 °C. Typical values are T =+25 °C
IN IN
OUT X OUT J(MAX)
A
A
Parameter
Symbol
Condition
Min Typ Max Units
Output Voltage Range
Output Voltage Tolerance
V
OUT
V
OUT_TOL
I = 200mA
OUT
PSAVE mode
0.8
3.3 (1)
V
-2.0 2.0 %
1.5
Line Regulation
Load Regulation
Average Output Current
Current Limit Threshold
Foldback Current Limit
Under-Voltage Lockout
ΔV
LINEREG
ΔV
LOADREG
I
OUT
ILIMIT
IFB_LIM
V
UVLO
2.9 ≤ V ≤ 5.5V, I = 200mA
IN OUT
200mA ≤ I ≤ 500mA
OUT
ILOAD > ILIMIT
Rising V
IN
Hysteresis
500
800
0.3 %/V
-1 %/A
mA
1300
mA
150 mA
2.9 V
200 mV
Quiescent Current
Shutdown Current
LX Leakage Current
High Side Switch Resistance
Low Side Switch Resistance
I
Q
I
SD
I
LX
R
DSON_P
R
DSON_N
No switching, I = 0mA
OUT
V = 0V
CTL 0-3
Into LX pin
I = 100mA
OUT
I = 100mA
OUT
38 60 μA
0.1 1.0 μA
0.1 1.0 μA
250
350
3






Recommended third-party SC195 Datasheet






@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)