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PDF FAN5336 Data sheet ( Hoja de datos )

Número de pieza FAN5336
Descripción 1.5MHz Boost Regulator
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! FAN5336 Hoja de datos, Descripción, Manual

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January 2007
FAN5336
tm
1.5MHz Boost Regulator with 33V Integrated FET Switch
Features
1.5MHz Switching Frequency
Low Noise
Adjustable Output Voltage
Up to 1.5A Peak Switch Current
Low Shutdown Current: <1µA
Cycle-by-Cycle Current Limit
Over-Voltage Protection at the Feedback Pin
Fixed-Frequency PWM Operation
Soft-Start Capability
Internal Compensation
Thermal Shutdown
Excellent Load Regulation: 0.2%
Low Ripple
6-Lead 3x3mm MLP
Applications
Portable Displays
Mobile Phone / Smart Phone LED Backlights
Display Bias
PDA, DVD, Camcorder Backlights
Pager and Cordless Phone Displays
Portable Medical Diagnostic Equipment
Remote Controls
MP3 or PMP or DSC Players
Serial Flash LED Drivers
Description
The FAN5336 is a high-efficiency, low-noise, fixed-fre-
quency PWM, current-mode, DC-DC boost regulator. It
is designed for small LCD bias supply and white LED
backlight supply applications. Depending on the applica-
tion, a FAN5336 regulator can output up to 33V at up to
50mA output current. With output voltage up to 21V, the
output current can be up to 100mA. FAN5336 can be
used for power conversion as low as 9V output voltage.
A current-mode control loop has a fast transient
response that provides excellent load regulation within
0.2% of output voltage. The FAN5336 switches at fixed
1.5MHz frequency, allowing the use of small, low-cost
external components. Constant frequency switching
results in low input noise and small output capacitors.
FAN5336 provides cycle-by-cycle current limiting up to
1.5A peak current.
The FAN5336 may be used to drive a serial flash LED
with up to 100mA current at 21V for a maximum of
400ms on-time and 10% duty cycle.
A low-EMI mode reduces interference and radiated elec-
tromagnetic energy caused by the ringing of the inductor.
Additional features include thermal shutdown, over-volt-
age protection, cycle-by-cycle current limit, low ripple,
and soft-start support.
The device is available in a 3x3mm 6-lead MLP, 0.8mm
thickness package.
Application Diagram
VIN
CIN
10µF
1V
IN
L1
6.8µH
SW 6
2
GND
P1
NC 5
ON
OFF
3 SHDN
FB 4
D1
R1
R2
CF
180pF
VOUT
COUT
4.7µF
© 2004 Fairchild Semiconductor Corporation
FAN5336 Rev. 1.0.0
Figure 1. Typical Application Diagram
www.fairchildsemi.com

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FAN5336 pdf
Typical Performance Characteristics
VIN=3.6V, VOUT=21V, TA=25°C, CIN=10µF, COUT=4.7µF, L=6.8µH, CF=180pF, R1=160kΩ, R2=10kΩ unless otherwise noted.
90
85
80
75
70
65
60
55
50
45
40
10
Efficiency vs. Load Current
Vin=2.7V
Vin=3.6V
Vin=5.5V
20 30 40 50 60 70 80 90 100
Load Current (mA)
Load Regulation
21.5
21.3
21.1
20.9
Vin=2.7V
20.7 Vin=3.6V
Vin=5.5V
20.5
10 20 30 40 50 60 70 80 90 100
Load Current (mA)
Figure 4. Efficiency vs. Load Current
Figure 5. Load Regulation
Line Regulation at No Load
22
21.8
21.6
21.4
21.2
21
20.8
20.6
20.4
20.2
20
2.5 3 3.5 4 4.5 5
Battery Voltage(V)
5.5
Figure 6. Line Regulation at No Load
Figure 7. 100mA Load Current Operation
Figure 8. Start-up Response
Figure 9. Load Transient Response
© 2004 Fairchild Semiconductor Corporation
FAN5336 Rev. 1.0.0
5
www.fairchildsemi.com

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