FAN5608 [FAIRCHILD]
Serial/Parallel LED Driver with Current-Regulated, Step-Up DC/DC Converter; 串行/并行LED驱动电流稳压，升压型DC / DC转换器
| 型号： | FAN5608 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Serial/Parallel LED Driver with Current-Regulated, Step-Up DC/DC Converter |
| 文件： | 总17页 (文件大小：207K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
FAN5608
Serial/Parallel LED Driver with Current-Regulated,
Step-Up DC/DC Converter
Features
Description
• Two Independent Channels Drive up to Six LEDs per
Channel
• Adaptive Output Voltage Drive to Maximize Efficiency
• PWM/PFM Mode of Operation of the Boost Circuit
• Up to 85% Efficiency
• Up to 2 × 20mA Output
• Two Built-in DACs for Independent (Digital) Brightness
Control for Both Channels
• LED’s Current Can be Duty-Cycle-Modulated between
0 to 20mA
• Digital, Analog, and PWM Brightness Control
• 2.7V to 5V Input Voltage Range
• 0.5MHz Operating Frequency (8MHz internal clock)
• Soft Start
The FAN5608 LED driver generates regulated output cur-
rents from a battery with input voltage varying between 2.7V
to 5V. An internal NMOS switch drives an external inductor,
and a Schottky diode delivers the inductor’s stored energy to
the load. Proprietary internal circuitry continuously monitors
the currrent on both strings and automatically adjusts the
generated output DC voltage to the lowest minimum value
required by the LEDs string with the highest summarized
forward voltage. This adaptive nature of the FAN5608
ensures operation at the highest possible efficiency. Soft start
circuitry prevents excessive current drawn from the supply
during power on. Any number of LEDs can be connected in
series as long as the summed forward voltages do notexceed
the specified operating output voltage range. Although it is
not required to have an equal number of LEDs connected in
series within each branch, the highest efficiency and best
current regulation is always achieved when an equal number
of LEDs are serially connected.
• Low Shutdown Current: ICC < 1µA
• LED Short Circuit Protection
• Minimal External Components Needed
• Available in space saving 8-lead and 12-lead MLP
Packages.
In the FAN5608 device, two internal two-bit D/A converters
provide independent programmability of each output channel
current. Analog programming of the output current is
also possible in the FAN5608. To do this, ground the "B"
pins and connect a resistor between the "A" pins and a
fixed supply voltage. The output current can then be
programmed to any desired value within its specified range.
The FAN5608DMPX/FAN5608MPX version uses a single
Applications
• Cell Phones
• Handheld Computers
• PDAs, DSCs, MP3 Players
• Keyboard Backlights
• LED Displays
Typical Application
Digital Brightness Control
CIN
CIN
L = 4.7µH
2.7V to 5V
L = 4.7µH
IND
IND
VIN
A1
VOUT
2.7V to 5V
IND
NC
IND
VIN
A1
VOUT
VOUT
4.7µF
4.7µF
GND
CH2
CH1
DAC Input For CH1
DAC Input For CH2
GND
CH2
CH1
NC
B1
DAC Input For CH1
DAC Input For CH2
B1
A2
B2
A2
B2
NC
4X4mm MLP-12 Package
4X4mm MLP-12 Package
with external Schottky diode
Order Code: FAN5608HMPX
with internal Schottky diode
Order Code: FAN5608DHMPX
REV. 1.0.3 6/28/04
PRODUCT SPECIFICATION
FAN5608
external resistor to set the current, and to turn the device ON
and OFF. The FAN5608DMPX/FAN5608MPX is available
in an 8-lead MLP package with or without an internal Schot-
tky diode. The FAN5608DHMPX is available in a 12-lead
MLP package with an internal Schottky diode.
Typical Application (Continued)
Analog Brightness Control
CIN
2.7V TO 5V
VEXTERNAL
CIN
VOUT
L = 4.7µH
VOUT
GND
NC
IND
2.7V TO 5V
IND
4.7µF
L = 4.7µH
4.7µF
VIN
GND
VIN
R
R
R
R
VEXTERNAL
CH2
CH1
A1
A2
CH2
CH1
A1
A2
3X3mm MLP-8 Package
3X3mm MLP-8 Package
with internal Schottky diode
Order Code: FAN5608DMPX
with external Schottky diode
Order Code: FAN5608MPX
Definition of Terms
Output Current Accuracy: reflects the difference between the measured value of the output current (LED) and
programmed value of this current.
(IOUT measured – IOUT programmed) × 100
Output Current Accuracy (%) = ------------------------------------------------------------------------------------------------------------
IOUT programmed
Current Matching: refers to the absolute value of difference in current between the two LED branches.
(ILED branch 1 – ILED branch 2) × 100
Current Matching (%) =
-----------------------------------------------------------------------------------------------
(ILED branch 1 + ILED branch 2) ⁄ 2
Efficiency: is expressed as a ratio between the electrical power into the LEDs and the total power consumed from the input
power supply.
(VLED branch 1 × ILED branch 1 + VLED branch 1 × ILED branch 1) × 100
Efficiency (%) = --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
VIN × IIN
Although this definition leads to a lower value than the boost converter efficiency, it more accurately reflects better system per-
formance, from the user’s point-of-view.
2
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
Pin Assignments
TOP-VIEW
NC
NC
IND
NC VOUT IND
12
11
10
12
11
10
VIN
8
A1
1
2
3
VIN
A1
1
2
3
4
8
7
6
5
1
2
3
9
GND
1
2
3
9
8
7
IND
CH2
B2
GND
IND
CH2
B2
7
CH1
A2
CH2
IND
CH1
A2
CH2
IND
8
7
CH1
B1
CH1
B1
6
GND
GND
5
4
V
OUT
NC
4
5
6
4
5
6
A1 VIN A2
A1 VIN A2
3x3mm 8-Lead MLP
3x3mm 8-Lead MLP
4x4mm 12-Lead MLP(QUAD) 4x4mm 12-Lead MLP(QUAD)
(Internal Schottky Diode) (External Schottky Diode)
(Internal Schottky Diode)
(External Schottky Diode)
FAN5608DMPX/FAN5608MPX
FAN5608DHMPX/FAN5608HMPX
Pin Descriptions
Pin Name
Pin No.
Pin Function Description
FAN5608DHMPX FAN5608HMPX FAN5608DMPX FAN5608MPX
1
2
3
4
5
GND
CH1
B1
GND
CH1
B1
GND
VIN
GND
VIN
Ground
Input Voltage
1st LED Cathode
DAC A2
A2
A2
DAC B1
CH2
IND
CH2
IND
2nd LED Cathode
DAC A1
A1
A1
Inductor
VIN
VIN
Input Voltage
Output LEDs Anode
No Connection
DAC A2
VOUT
NC
GND
CH1
A1
6
7
8
A2
B2
A2
B2
GND
CH1
A1
Ground
DAC B2
1st LED Cathode
2nd LED Cathode
DAC A1
CH2
CH2
9
IND
IND
IND
IND
SD Anode
10
11
Inductor
VOUT
Output LEDs Anode
No Connection
No Connection
NC
NC
12
NC
REV. 1.0.3 6/28/04
3
PRODUCT SPECIFICATION
FAN5608
Absolute Maximum Ratings
Parameter
Min
-0.3
-0.3
Typ
Max
Unit
V
VIN, A, B Voltage to GND
6
24
VOUT to GND
V
CH1, CH2 Voltage to GND
8
V
Any LED Short Circuit Duration (Anode to Cathode)
Lead Soldering Temperature (10 seconds)
Thermal Resistance θjc
Indefinite
300
°C
°C/W
°C
8
Operating Junction Temperature Range
Storage Temperature Range
Electrostatic Discharge (ESD) Protection (Note 1, 2)
150
150
-55
4
°C
HBM
CDM
kV
1
DC Electrical Characteristics
(VIN = 2.7V to 5V, TA = 25°C, unless otherwise noted. Boldface values indicate specifications over the ambient
operating temperature.)
Parameter
Conditions
Min.
Typ.
Max.
Units
Output Current Accuracy
A = HIGH,
B = HIGH
0.9 × INOM INOM = 20 1.1 × INOM mA
Channel to Channel Current Matching
A = HIGH,
B = HIGH
3
%
%
Efficiency (AVG)
VIN > 3.0V
80
Switching Frequency
Multiplication Ratio
0.5
MHz
FAN5608DMPX/
FAN5608MPX
900
850
1000
1100
1150
FAN5608DHMPX/
FAN5608HMPX
1000
0.1
Supply Current in OFF mode
Input A1, A2 Threshold
VA = VB = 0V
High
µA
V
Digital
Mode
VIN-0.7
0
VIN
0.6
Low
Analog Mode
Digital Mode
1.2
50
Input B Threshold
High
Low
0.6 × VIN
VIN
0.3 × VIN
60
V
0
Input A1, A2 Current
Input B1, B2 Current
Digital Mode
Digital Mode
VA = VIN
VA = 0
µA
µA
µA
0.1
0.1
Recommended Operating Conditions
Parameter
Min
2.7
-40
VIN
Typ
Max
5
Unit
V
Input Voltage Range
Operating Ambient Temperature Range
Output Voltage Range
Notes:
25
85
18
°C
V
1. Using Mil Std. 883E, method 3015.7(Human Body Model) and EIA/JESD22C101-A (Charge Device Model).
2. Avoid positive polarity ESD stress at the cathode of the internal Schottky diode.
4
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
Block Diagram
V
IN
IND
OSC
DBB
COIL DRIVER
V
OUT
IND
LINEAR REGULATOR
CH1
START-UP
B1
DAC1
A1
W_OR
REF CH1
REF CH2
BG
REF
B2
A2
LINEAR REGULATOR
CH2
DAC2
POWER GOOD
GND
Note: In the 8-pin version (analog version only), pins B1 and B2 are omitted.
To maintain the regulated current at the selected value, the
difference in the number of LEDs between branches should
not exceed one. If only one branch is used, another branch
should be disabled, connecting the corresponding DAC
inputs to low. If the output external capacitor is shorted, the
Schottky diode can be damaged, therefore such a condition
should be avoided.
Circuit Description
When the input voltage is connected to VIN pin, the system is
turned on, the bandgap reference acquires its nominal volt-
age and the soft-start cycle begins. Once “power good” is
achieved (0.5mA in the diodes), the soft-start cycle stops and
the boost voltage increases to generate the desired current
selected by the input control pins. If the second channel is
not selected, its output will go high to about VIN, and the
diodes are turned off.
LED Brightness Control
The control inputs are A1, B1 for CH1 and A2, B2 for CH2.
B1 and B2 are digital inputs, thus they require LOW (GND)
and HIGH (VCC) control signals. In analog mode, A1 and A2
are connected to an external stable voltage source via an
external resistor, and B1 and B2 inputs are connected to
ground. The current flowing through the resistor is scaled by
a factor of approximately 1000.
The FAN5608 DC/DC converter automatically adjusts its
internal duty cycle to achieve high efficiency. It provides
tightly regulated output currents for the LEDs. An internal
circuit determines which LED string requires the highest
voltage in order to sustain the pre-set current levels, and
adjusts the boost regulator accordingly.
REV. 1.0.3 6/28/04
5
PRODUCT SPECIFICATION
FAN5608
Digital Control
PWM Control in Analog Mode
The FAN5608’s digital decoder allows selection of the fol-
lowing modes of operation: OFF, 5mA, 10mA, 20mA per
branch.
The logic level HIGH, VH and logic level LOW, VL of the
PWM signal should be:
VRef < VH < (VIN – 0.7V) and 0 < VL < 0.6V
The frequency of the PWM signal should be within 50Hz
to 1kHz range. The VH sets the maximum LED current
while the duty cycle sets the average current between 0 and
A
B
0
0
1
0
0
1
1
1
ILED
OFF
5mA
10mA
20mA
ILEDmax
.
Analog Control
If the analog inputs A1 and/or A2 are driven in digital mode
by an open drain output, it is important to choose the appro-
priate value of the pull-up resistor. Its resistance should be
low enough to ensure less than 0.7V dropout, hence VA >
(VIN – 0.7V) as required for HIGH logic level:
Inputs A1 and A2 are used to control the LED currents.
Inputs B1 and B2 should be connected to GND (logic level
“0”). An external resistor (R) is connected from A1 and/or
A2 to a stable voltage source (VExternal) to control the LED
current, ILED. The ILED can be determined using the formula
and the graph below:
700mV
------------------
= 11.66kΩ
Rpull – up
<
60µA
VExternal – VRef
----------------------------------------
ILED
=
× Multiplication Ratio
R
Open-Circuit Protection
A built-in over voltage protection circuit prevents the device
from being damaged when it is powered up with no load.
This circuit reduces the boost converter duty cycle, to a
minimum thus limiting the output voltage to a safe value
when no load condition is detected. If one of the two enable
branches is accidentally disconnected, the converter contin-
ues the operation, however, the current in the remaining
branch is no longer regulated and the actual branch current
will be determined by the input voltage, the inductor value
and the switching frequency.
Where VRef = 1.22V, VRef < VExternal < (VIN – 0.7V)
25
R=10Kohm
20
15
10
R=100kohm
5
However, the FAN5608 can be damaged when a full load
(more than six LEDs, driven by 20mA) is suddenly discon-
nected from VOUT. To protect the FAN5608 against this
unlikely event, an external 24V Zener diode can be con-
nected between VOUT and GND.
0
1.25 1.5 1.75
2
2.25 2.5 2.75
External (V)
3
3.25 3.5
V
PWM Control in Digital Mode
The logic level HIGH, VH and logic level LOW, VL of the
PWM signal should be:
Shutdown Mode
Each branch can be independently disabled by applying
LOW logic level voltage to the A and B inputs. When both
branches are disabled, the FAN5608 enters Shutdown mode
and the supply current is reduced to less than 1µA.
(VIN – 0.7V) < VH < VIN and 0 < VL < 0.6V
The frequency of the PWM signal should be within 50Hz to
1kHz range; it can go up to 30kHz at any input if the other
input is kept HIGH. In the case of FAN5608MPX and
FAN5608DMPX, the B1 and B2 inputs are internally con-
nected to GND and the PWM signal can be applied to A1
and A2 inputs only. Consequently, the maximum LED
current, for 100% duty cycle, is 5mA on each channel.
6
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
PWM Control
1. A is PWM Controlled, B is Low. ILED (Average) = δ x 5mA, where δ is Duty Cycle. (Note 3)
A Input (PWM)
30%
Duty Cycle
70%
Duty Cycle
1KHz
1KHz
B Input (0)
ILED (Average) = 0.7 x 5mA = 3.5mA
ILED (Average) = 0.3 x 5mA = 1.5mA
I
0mA
OFF
LED
2. A is High and B is PWM. ILED (Average) = 5mA + δ x 15mA, where δ is Duty Cycle. (Note 4)
A Input
B Input (PWM)
30%
Duty Cycle
70%
Duty Cycle
1KHz
1KHz
ILED (Average) = 0.7 x 20mA + 0.3 x 5mA = 15.5mA
ILED (Average) = 0.3 x 20mA + 0.7 x 5mA = 9.5mA
I
OFF
0mA
LED
3. A and B are PWM. ILED (Average) = δ x 20mA, where δ is Duty Cycle. (Note 5)
A Input (PWM)
30%
Duty Cycle
70%
Duty Cycle
1KHz
1KHz
B Input (PWM)
30%
Duty Cycle
70%
Duty Cycle
1KHz
1KHz
ILED (Average) = 0.7 x 20mA = 14mA
ILED (Average) = 0.3 x 20mA = 6mA
I
0mA
OFF
LED
Notes:
3. Proportionally select the duty cycle to achieve a typical LED current between 1mA to 4mA.
4. Maximum PWM frequency can be 30KHz.
5. Proportionally select the duty cycle to achieve a typical LED current between 1mA and 19mA.
REV. 1.0.3 6/28/04
7
PRODUCT SPECIFICATION
FAN5608
A larger value input capacitor placed as close as possible to
FAN5608 may be needed to reduce the input voltage ripple
in noise sensitive applications. An additional LC filter
between the battery and the FAN5608 input can help to
further reduce the battery ripple to the level required by a
particular application.
Application Information
Inductor Selection
The inductor is one of the main components required by the
boost converter to store energy. The amount of energy stored
in the inductor and transferred to the load is controlled by the
regulator using PWM and pulse skipping techniques. In most
cases the FAN5608 operates the inductor in discontinuous
conduction mode.
Schottky Diode Selection
The FAN5608HMPX and FAN56508MPX require the use of
an external Schottky diode. This diode should be rated at
200mA to 500mA average rectified current and 20V
maximum repetitive reverse voltage.
To ensure proper operation of the current regulator over the
entire range of conditions, select the inductor based on the
maximum required power (POUT) and the minimum input
voltage (VIN).
The MBR0520L (Fairchild) Schottky diode is
recommended.
(VIN)2 × F
POUT
--------------------------
L <
Driving Higher Current LEDs
To increase the LED current range to 50mA, the CH1 and
CH2 outputs may be connected, as shown below:
where units of L, VIN, and POUT are in µH, Volt, and Watt,
respectively and F = 0.4 is a factor depending upon the
FAN5608 architecture.
Analog Brightness Control
The above relation is applicable up to POUT = 0.6W and
L = 4.3µΗ , or greater. At lower inductor values the effi-
ciency decreases due to the resistive loss in the switching
Power FET. Using L = 4.3µΗ and increasing the load to 12
LED x 20mA (POUT = 800mW) requires VIN > 3.5V to
maintain a constant 20mA current through LEDs. The induc-
tor L = 4.3µH ensures proper operation for 2 x 4 white LEDs
with 20mA at 3.5V for VIN > 2.8V.
C
IN
L = 4.7µH
IND
IND
2.7V to 5.5V
4.7µF
GND
V
IN
V
EXTERNAL
A
A
1
2
CH1
CH2
For any lighter load or higher VIN, the inductance can be
increased to improve the system efficiency. Application
examples are given in Figure 1 through Figure 4.
Digital Brightness Control
The peak current in the inductor is:
TON_Max × VIN_Max
I= -------------------------------------------------
L
C
IN
L = 4.7µH
IND
IND
2.7V to 5.5V
4.7µF
GND
which gives the maximum rated current for the inductor. For
L = 4.3µH, TON_Max = 1.25µS and VIN_Max = 4.2V, the
inductor saturation current should be at least 1A.
A
B
1
1
CH1
CH2
DAC Inputs
A
B
2
2
Capacitor Selection
Low ESR capacitors should be used to minimize the input
and output ripple voltage. Use of CIN = 4.7µF/6.3V and
COUT = 4.7µF/25V type X5R/X7R multi layer ceramic
capacitor is recommended.
8
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
The current feeding the string of LEDs is the sum of the cur-
rents programmed for each branch in digital or analog mode.
Using all four inputs in digital mode, the LED current can be
programmed within the 0 to 40 mA range, according to the
following table :
PCB Layout Consideration
The FAN5608 is available in both a single Die Attach Pad
(DAP) and a dual DAP package. In the single DAP package,
DAP is connected to GND. In the dual DAP package, one
DAP is connected to GND and another to VOUT, therefore it
is not necessary to provide any external connection to the
DAPs. Since the internal power dissipation is low, both the
3x3mm and 4x4mm MLP packages are capable of dissipat-
ing maximum power, without providing any PCB land pat-
tern. When viewing the bottom of the package of a single
DAP device, a single exposed metal island can be seen; when
viewing the bottom of the package of a dual DAP device,
two electrically isolated exposed metal islands can be seen.
Input A1 Input B1 Input A2 Input B2 ILED (mA)
0
1
0
0
0
1
1
0
0
1
0
1
1
1
0
1
0
0
0
1
0
0
0
1
1
1
0
1
0
1
1
1
0
0
1
0
0
1
0
1
0
0
1
1
1
0
1
1
0
0
0
0
1
0
1
0
1
0
1
0
1
1
1
1
0
5
5
10
10
10
15
15
20
20
20
25
25
30
30
40
REV. 1.0.3 6/28/04
9
PRODUCT SPECIFICATION
FAN5608
Application Examples
1. Driver For Four White LEDs
Efficiency vs Input Voltage
Four LEDs
0.85
0.80
0.75
0.70
I
= 20mA
L = 6.8µH
LED
2.7V to 5V
IND
VIN
A1
IND
VOUT
VOUT
4.7µF
GND
DAC Input For CH1
DAC Input For CH2
B1
CH2
CH1
A2
B2
NC
I
LED
= 10mA
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 1
2. Driver For Six White LEDs
Efficiency vs Input Voltage
Six LEDs
0.90
0.85
0.80
0.75
0.70
0.65
0.60
I
= 20mA
LED
L = 6.8µH
2.7V to 5V
IND
IND
VIN
A1
VOUT
VOUT
4.7µF
GND
CH2
CH1
DAC Input For CH1
DAC Input For CH2
B1
A2
B2
NC
I
= 10mA
LED
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 2
3. Driver For Eight White LEDs
Efficiency vs Input Voltage
Eight LEDs
0.90
0.85
0.80
0.75
0.70
0.65
0.60
L =4.7µH
2.7V to 5V
IND
IND
VIN
A1
VOUT
I
LED
= 20mA
VOUT
4.7µF
GND
CH2
CH1
DAC Input For CH1
DAC Input For CH2
B1
A2
B2
NC
I
LED
= 10mA
4.5
2.5
3.0
3.5
4.0
5.0
5.5
Figure 3
Input Voltage (V)
10
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
4. Driver For 12 White LEDs
Efficiency vs Input Voltage
Twelve LEDs
L = 4.7µH
2.7V to 5V
0.80
0.75
0.70
0.65
0.60
0.55
0.50
IND
IND
VIN
A1
VOUT
I
= 10mA
LED
VOUT
4.7µF
GND
CH2
CH1
DAC Input For CH1
DAC Input For CH2
B1
A2
B2
NC
I
= 20mA
LED
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
Figure 4
Note:
Refer to the Application Information, if a higher load current compliance rating is required
Typical Performance Characteristics
TA = 25°C, CIN = COUT = 4.7µF, L = 4.7µH, unless otherwise noted.
Shutdown Current vs Input Voltage
0.065
0.060
0.055
0.050
0.045
0.040
0.035
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
REV. 1.0.3 6/28/04
11
PRODUCT SPECIFICATION
FAN5608
TA = 25°C, CIN = COUT = 4.7µF, L = 4.7µH, unless otherwise noted.
Efficiency vs LED Current
0.90
0.85
0.80
0.75
0.70
0.65
2X2 LEDs type QTPL670CiW
CIN = 47µF, COUT = 4.7µF
VIN = 3.6V
L = 10µH
L = 15µH
L = 22µH
0
2
4
6
8
10
12
14
16
18
20
LED Current (mA)
Regulated LED Current vs Input Voltage
10.5
20
5.4
10.0
19
18
17
16
15
5.2
5.0
4.8
4.6
9.5
A=1, B=0 Scale1
A=0, B=1 Scale2
A=1, B=1 Scale3
9.0
8.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Input Voltage (V)
12
REV. 1.0.3 6/28/04
PRODUCT SPECIFICATION
FAN5608
Mechanical Dimensions
4x4mm 12-Lead MLP (Internal Schottky Diode)
4.20
3.00
2.51
A
4.0
VOUT
GND
(0.60)
0.15 C
B
2X
12
10
0.45
1
2
9
7
4.20
3.00
4.0
2.35
1.30
(0.60)
0.15 C
4
6
2X
TOP VIEW
SIDE VIEW
0.80 MAX
1.19
0.80 TYP
0.81
0.42 TYP
0.10 C
0.08 C
(0.20)
RECOMMENDED LAND PATTERN
0.05
0.00
C
SEATING
PLANE
2.51 MAX
1.19
0.81
0.45
0.75
0.35
3
4
6
7
1.30
1.60
2.35 MAX
0.80
9
1
PIN #1 IDENT
12
10
0.25~0.35
0.80
M
0.10 C A B
M
0.05
BOTTOM VIEW
NOTES:
A. CONFORMS TO JEDEC REGISTRATION MO-220,
VARIATION WGGB, DATED 08/2002
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994
13
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
Mechanical Dimensions
4x4mm 12-Lead MLP (External Schottky Diode)
4.20
3.00
2.51
A
4.0
0.15 C
B
2X
12
10
(0.60)
0.45
1
3
9
7
4.20
3.00
4.0
2.35
1.30
(0.60)
0.15 C
4
6
2X
TOP VIEW
SIDE VIEW
0.80 MAX
1.19
0.80 TYP
0.81
0.42 TYP
0.10 C
0.08 C
(0.20)
RECOMMENDED LAND PATTERN
0.05
0.00
C
SEATING
PLANE
2.51 MAX
1.19
0.81
0.45
0.75
0.35
4
6
3
7
1.30
1.60
2.35 MAX
0.80
9
1
PIN #1 IDENT
12
10
0.25~0.35
0.80
M
0.10 C A B
M
0.05
BOTTOM VIEW
NOTES:
A. CONFORMS TO JEDEC REGISTRATION MO-220,
VARIATION WGGB, DATED 08/2002
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994
REV. 1.0.3 6/28/04
14
PRODUCT SPECIFICATION
FAN5608
Mechanical Dimensions
3x3mm 8-Lead MLP (Internal Schottky Diode)
2.54
VOUT
1.37
1.27
GND
0.76
1.18
3.0
A
B
0.15 C
8
5
2X
1.99
3.30
1.40
3.0
(0.65)
1
4
0.15 C
0.42 MAX
0.65 TYP
2X
TOP VIEW
RECOMMENDED LAND PATTERN
0.8 MAX
0.10 C
(0.20)
0.08 C
0.05
0.00
C
SEATING
PLANE
SIDE VIEW
2.54 MAX
1.37
1.26
1
0.76
PIN #1 IDENT
4
0.45
0.43
1.40 MAX
1.18
8
5
0.25~0.35
0.65
M
0.10 C A B
M
1.95
0.05
BOTTOM VIEW
NOTES:
A. CONFORMS TO JEDEC REGISTRATION MO-229,
VARIATION VEEC, DATED 11/2001
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994
15
REV. 1.0.3 6/28/04
FAN5608
PRODUCT SPECIFICATION
Mechanical Dimensions
3x3mm 8-Lead MLP (External Schottky Diode)
2.37
3.0
A
B
0.15 C
4
1
2X
1.99
3.30
1.42
3.0
(0.65)
5
8
0.15 C
0.65 TYP
0.47 TYP
2X
TOP VIEW
1.0 MAX
RECOMMENDED LAND PATTERN
0.10 C
(0.20)
0.08 C
0.05
0.00
C
SEATING
PLANE
SIDE VIEW
2.25
MAX
1
4
0.45
0.20
1.30 MAX.
0.25~0.35
5
8
0.65
M
Ø0.10 C A B
1.95
M
Ø0.05
BOTTOM VIEW
NOTES:
A. CONFORMS TO JEDEC REGISTRATION MO-229,
VARIATION VEEC, DATED 11/2001
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994
REV. 1.0.3 6/28/04
16
PRODUCT SPECIFICATION
FAN5608
Ordering Information
Product Number
Package Type
Schottky Diode
Internal
Order Code
FAN5608
12-Lead MLP(4x4mm)
8-Lead MLP(3x3mm)
FAN5608DHMPX
FAN5608HMPX
FAN5608DMPX
FAN5608MPX
External
Internal
External
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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2003 Fairchild Semiconductor Corporation
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