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PDF SC21150 Data sheet ( Hoja de datos )
| Número de pieza | SC21150 | |
| Descripción | Tiny 1.2A Synchronous Buck Regulator | |
| Fabricantes | Semtech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC21150 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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POWER MANAGEMENT
Features
Input voltage range — 2.3V to 5.5V
1.2A continuous output current
4MHz switching frequency
• Adjustable Output Voltage
0.8V to VIN
1% output voltage accuracy
Adaptive On-Time architecture
Up to 100% duty cycle
Up to 96% peak efficiency
Power Save mode for efficient light load operation
>90% efficiency 30mA to 75mA
1μA shutdown current
23μA quiescent current
Pre-bias startup protection
Internal or optional external Soft Start
Device options (contact Semtech Marketing)
• Automatic output discharge
• Power Good indicator
• Internal Soft Start
• External Programmable Soft Start
• Forced PWM Operation Input
0.75mm x 1.11mm, 6-Bump WLCSP Package
WEEE and RoHS compliant and halogen-free
SC21150
Tiny 1.2A Synchronous
Buck Regulator
Description
The SC21150 is an ultra high efficiency 1.2A DC/DC buck
regulator available in a tiny CSP package. These features
make the SC21150 family perfect for small form factor
portable applications where long battery life is essential.
SC21150 is an Adaptive On-Time 4MHz switching regula-
tor at full load conditions. Under light load conditions it
seamlessly transitions into Power Save Mode and reduces
switching frequency thus saving energy. High switching
frequency operation allows the use of a very small 0.47μH
inductor along with small input and output capacitors to
minimize overall circuit size. A Forced PWM input allows
continuous switching under all load conditions.
The SC21150 is highly configurable with a wide range of
factory options including internal Soft Start time, fixed or
adjustable output voltage, automatic output discharge,
and a Forced PWM input.
The SC21150 is offered in an ultra small WLCSP 6-Bump
0.75mm x1.11mm package with a bump pitch of 0.35mm.
The SC21150 operating temperature range is -40C to
+85C.
Applications
Automotive
Smart Phones
Wearable Electronics
Tablet PCs
GPS devices
Battery powered equipment
Portable devices
Typical Application Circuit
Adjustable Output Voltage
2.3V-5.5V Supply
VIN LX
4.7µF SC21150
0.47µH
1.2A
Output
10µF
FPWM
FPWM
FB
EN EN GND
Rev 2.0
1 page  
SC21150
Electrical Characteristics (continued)
Parameter
Output Voltage Range
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Output Current
Soft Start
Soft Start Time (1)
LX Switching Node
On Resistance High-side
On Resistance Low-side
LX Leakage Current High Side
LX Leakage Current Low Side
LX Pulldown Current(1)
Switching Frequency(1)
Current Sense
High Side Current Limit
Low Side Current Limit
Zero Cross Detector Threshold
Thermal Protection
Over-Temperature Shutdown
Over-Temperature Hysteresis
EN Input
EN Input High Threshhold
EN Input Low Threshhold
EN Input High Current
EN Input Low Current
Symbol
Vout
dVline
dVload
IOUT
Conditions
Adjustable Vout
5.5V > VIN > (Vout +1), PWM operation
500mA < ILOAD < 1.2A
Continuous current
Min
0.8
1.2
TSS
FB: from LX rising edge to
95% of final value
Rdson_hs
FB = 0V; ILX = 500mA
Rdson_ls
FB = VIN; ILX = 500mA
ILX_hs
ILX_ls
ILX_pd
Fsw
FB = VIN = 5.5V; VLX = 0V
FB = 0V; VLX = VIN = 5.5V;
Vout Automatic Discharge disabled
EN = 0V; VLX = 1V;
Vout Automatic Discharge enabled
4MHz option, PWM operation, 500mA load,
adjustable output, Vout = 2.5V
-1.5
3.6
ILIMhs
ILIMls
Ithzcpfm
Current from VIN to LX
Current from LX to GND
Power Save Mode and DC Test condition
1.5
Tts_rise
Tts_hyst
Rising temperature
VIHen
VILen
IIHen
IILen
VEN = VIN
VEN = 0V
1.2
-1
Typ
0.17
-0.13
100
160
120
-0.1
0.1
20
4.0
2.2
-0.8
0
160
10
Max Units
VIN V
%/V
%/A
A
μs
mΩ
mΩ
μA
1 μA
mA
4.4 MHz
3.0 A
A
mA
°C
°C
V
0.4 V
μA
1 μA
5 Page 
Detailed Application Circuit
SC21150
Adjustable Output Voltage
2.3V-5.5V Supply
VIN LX
4.7µF SC21150
0.47µH
1.2A
Output
10µF
FPWM
FPWM
FB
EN EN GND
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet SC21150.PDF ] | |
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