FAN2103 Datasheet PDF - Fairchild Semiconductor
| Part Number | FAN2103 | |
| Description | 24V Input Integrated Synchronous Buck Regulator | |
| Manufacturers | Fairchild Semiconductor | |
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December 2007
www.datasheet4u.com
FAN2103 — TinyBuck™
3A, 24V Input Integrated Synchronous Buck Regulator
Features
Over 95% efficiency
Internal power MOSFETs:
High-side RDS(ON) = 31mΩ
Low-side RDS(ON) = 23mΩ
Integrated low-side Schottky diode
Programmable frequency operation up to 750KHz
Power-good signal
Wide input range: 3.0V to 24V
Output voltage range: 0.8V to 90%VIN
Input under-voltage lockout (UVLO)
Programmable over-current protection
Under-voltage, over-voltage, and thermal protection
Selectable light-load power-saving mode
5x6mm, 25-pin, 3-pad MLP
Applications
Thin and light Notebook PCs
Graphics cards
Battery-powered equipment
Set-top box
Point-of-load regulation
Description
The FAN2103 TinyBuck™ is an easy-to-use, cost- and
space-efficient, synchronous buck solution. It enables
designers to solve high-current requirements in a small
area with minimal external components.
External programming of clock frequency, current limit,
and loop response allows for optimization and flexibility
selecting output filter components and transient response.
The summing current mode modulator uses lossless
current sensing for current feedback and over-current,
and includes voltage feedforward.
Fairchild’s advanced BiCMOS power process,
combined with a thermally efficient MLP package,
provides low-RDS(ON), internal MOSFETs, and the ability
to dissipate high power in a small package.
Under-voltage, thermal shutdown, and power-good are
blanked at start-up, but protect the device from damage
during fault conditions.
Related Application Notes
AN-5067 – PCB land pattern design and surface
mount guidelines for MLP packages
Ordering Information
Part Number
FAN2103MPX
FAN2103EMPX
Operating
Temperature Range
-10°C to 85°C
-40°C to 85°C
Package
Packing Method
25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel
25-Pin Molded Leadless Package (MLP) 5x6mm Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
© 2007 Fairchild Semiconductor Corporation
FAN2103 Rev. 1.0.3
www.fairchildsemi.com
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Electrical Specifications
Recommended operating conditions are the result of using the circuit shown in Figure 1 unless otherwise noted.
Parameter
Conditions
Min.
Power Supplies
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VCC Current
VCC UVLO Threshold
SW = Open, FB = 0.7V, VCC = 5V,
FSW = 600KHz
Shutdown: EN = 0, VCC = 5V
Power Saving Mode, VCC = 5V, FMIN
Rising VCC
Hysteresis
4.1
Power Output Section
N-Channel (Q1) RDS(ON)
N-Channel (Q2) RDS(ON)
Oscillator
Frequency
Minimum On-Time(2)
Ramp Amplitude, pk–pk
Minimum Off-Time(2)
VCC = 5V, 25°C
RT = 50KΩ
RT = 24KΩ
16VIN, 1.8VOUT, RT = 30KΩ,
RRAMP = 200KΩ
255
540
Reference
Reference Voltage (VFB)
FAN2103M,
FAN2103EM
FAN2103M, 25°C
FAN2103EM, 25°C
Temp. Coefficient (-10 to +85°C)
Temp. Coefficient (-40 to +85°C)
794
795
Error Amplifier
DC Gain(2)
Gain Bandwidth Product(2)
Output Voltage (VCOMP)
Output Current, Sourcing
Output Current, Sinking
FB Bias Current
VCC = 5V
VCC = 5V, VCOMP = 2.2V
VCC = 5V, VCOMP = 1.2V
VFB = 0.8V, 25°C
80
12
0.4
1.5
0.8
-850
Protection and Shutdown
Current Limit
ILIM Current
Over-Temperature Shutdown
Over-Temperature Hysteresis
RILIM open
25°C, VCC = 5V
Internal Temperature
3.8
9
Over-Voltage Threshold
2 Consecutive Clock Cycles
110
Under-Voltage Shutdown
16 Consecutive Clock Cycles
68
Fault Discharge Threshold
Measured at FB Pin
Fault Discharge Hysteresis
Measured at FB Pin (VFB ~500mV)
Note:
2. Specifications guaranteed by design and characterization; not production tested.
Typ. Max. Unit
8 12 mA
7 10 µA
2.2 4.5 mA
4.3 4.5 V
300 mV
31 35 mΩ
23 25 mΩ
300
600
50
0.53
100
345 KHz
660 KHz
65 ns
V
150 ns
800 806 mV
800 805 mV
50 PPM
70 PPM
85
15
2.2
1.2
-650
3.2
-450
dB
MHz
V
mA
mA
nA
5.0 7.0 A
10 11 µA
160 °C
30 °C
115 120 %VOUT
73 78 %VOUT
250 mV
250 mV
© 2007 Fairchild Semiconductor Corporation
FAN2103 Rev. 1.0.3
5
www.fairchildsemi.com
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FAN2103 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ FAN2103.PDF Datasheet ] | |
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