Solved by
SP7648
TM
Low Reference High efficiency Boost Regulator
FeaTUReS
■ True Shutdown
■ 700mA Output Current at 3.3V Input; 4.2V
output
■ 92% Efficiency from 2.7V IN to 3.3VOUT
■ Wide Input Voltage Range: 2.7V to 4.5V
■ 5V Fixed or Adjustable Output
■ 0.3 1Switch
■ Integrated Synchronous Rectifier:0.3 1
■ Anti-Ringing Switch Technology
■ Programmable Inductor Peak Current
■ Logic Shutdown Control
■ Low 0.8V or 0.288V Reference Voltage
■ Small 10 pin DFN or MSOP Package
V
10 V
BATT 1
FLASH
2
NC (Test)
3
R
LIM
4
SHDN
5
SP7648
OUT
9 LX
8 P
10 Pin DFN
GND
7 GND
6 FB
Now Available in Lead Free Packaging
aPPLicaTiOnS
■ LED Driver
■ Camera Flash
■ Handheld Portable Devices
DeScRiPTiOn
The SP7648 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for
single cell Li-Ion or dual cell alkaline battery applications to drive various LEDs. The SP7648
combines low quiescent current and excellent light-load efficiency of PFM control. The SP7648
features synchronous rectification, a 0.31charging switch, an anti-ringing inductor switch, undervoltage lockout and programmable inductor peak current. The device can be shut down by a
1nA active LOW shutdown pin. A very low 0.288V reference voltage is optimized for driving a
constant current load.
TYPicaL aPPLicaTiOn ciRcUiT
4.7µH
Vin
(2.7 - 4.5V)
10µF
®
VBATT
On/OFF
SHDN
SP7648
RLIM
RLIM
1.0K1
LX
VOUT
NC
10µF
470pF
FLASH
GND PGND FB
0.331
1K1
FLaSH
Mar16-06 Rev B
D1
R2
R1
Q1
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
aBSOLUTe MaXiMUM RaTingS
Operating Temperature ................................................ -40°C to +85°C
ESD Rating ........................................................................ 1.5kV HBM
LX, Vo, VBATT, FLASHOUT, FB to GND pin ...................... -0.3 to 6.0V
SHDN, FLASH ..................................................... -0.3V to VBATT+1.0V
Vo, GND, LX Current ....................................................................... 2A
Reverse VBATTCurrent .............................................................. 220mA
Forward VBATTCurrent .............................................................. 500mA
Storage Temperature .................................................. -65 °C to 150°C
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
eLecTRicaL SPeciFicaTiOnS
VBATT =VSHDN = 3.6V, VFB=ZeroV, ILOAD = 0mA, TAMB= -40°C to +85°C, VOUT = 5.0V, typical values at 27°C unless
otherwise noted. The z denotes the specifications which apply over full operating temperature range -40ºC to +85°C, unless
otherwise specified.
PaRaMeTeR
Min
TYP
MaX
UniTS
z
cOnDiTiOnS
Input Voltage Operating Range, VBATT
2.7
-
4.5
V
z
After Startup
Output Voltage Range, VOUT
2.7
-
5.5
V
z
Under Voltage Lock-out/UVLO
0.5
0.61
0.7
V
z
Output Voltage, VO
4.6
5.0
5.4
V
z
Internal Feedback Divider
VSHDN = ZeroV
Shutdown Current into VO, ISDO
-
1
500
nA
z
Shutdown Current into VBATT, ISDB
-
250
750
nA
z
VSHDN = ZeroV, VBATT = 2.7V
92
-
%
-
VBATT = 2.7V, IOUT = 200mA, RLIM = 2k1
650
800
1600
1000
mA
mA
z
z
RLIM = 2k1, IPK = 1600/RLIM
RLIM = 1k1, IPK = 1600/RLIM
-
800
400
200
-
mA
mA
mA
-
VBATT = 2.7V, RLIM =1k1
VBATT = 2.7V, RLIM =2k1
VBATT = 2.7V, RLIM = 4k1
Minimum Off-Time Constant KOFF
0.5
1.0
1.5
V*µs
z
KOFF )T OFF (VOUT - VBATT)
Maximum On-Time Constant KON
Efficiency
Inductor Peak Current Limit, IPK
Output Current (Note 2)
2.0
3.5
5.0
V*µs
z
KON *T ON (VBATT)
Enable Valid to Output Stable (Note 3)
-
300
500
µs
-
ILOAD = 1mA
NMOS Switch Resistance
-
0.30
0.6
1
z
INMOS = 100mA
PMOS Switch Resistance
-
0.30
0.6
1
z
IPMOS = 100mA
0.76
0.266
0.8
0.288
0.84
0.310
V
V
z
z
External feedback Flash = 0
External feedback Flash = 1
-
1
100
nA
z
VFB =1.3V
2.0
-
0.5
-
V
z
z
VBATT = 2.7V
VBATT = 2.7V
SHDN Input Current
-
1
100
nA
z
LX Pin Leakage
-
-
3
µA
-
1.0
-
0.4
-
V
V
FB Set Voltage, VFB
FB Input Current
SHDN Input Voltage (Note 1)
VIL
VIH
FLASH Threshold V IL
VIH
note 1:SHDN must transition faster than 1V/100mS for proper operation.
note 2:Output Current I =
VIN
Current}
{ VOUT
} X Efficiency x {Inductor Peak Current - Inductor Ripple
2
note 3:Guaranteed by Design.
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
Pin DeScRiPTiOn
Pin nUMBeR
Pin naMe
1
VBATT
DeScRiPTiOn
Battery Voltage. The startup circuitry is powered by this pin. Battery
Voltage is used to calculate switch off time: TOFF= K OFF/ (VOUTVBATT). When the battery voltage drops below 0.61V the SP7648
goes into an undervoltage lockout mode (UVLO), where the part is shut
down.
2
FLASH
Reference Control Input. Internal Reference defaults to 0.8V if FLASH
= LOW and 0.288V if FLASH = HIGH.
3
NC (Test)
No connection. This pin is bonded out for test purposes only and
must be left floating in all applications.
4
RLIM
Current Limit Resistor. By connecting a resistor RLIM from this pin to
ground the inductor peak current is set by IPEAK=1600/RLIM. The range
for RLIM is 9k1(for 180mA) to 1.K 1(for 1.6A).
5
SHDN
6
FB
Shutdown Not. Tie this pin high to V BATT,for normal operation. Pull
this pin to ground to disable all circuitry inside the chip.
Feedback. Connect this pin to GND for fixed +5V operation. Connect
this pin to a resistor voltage divider between VOUTand GND for
adjustable output operation.
7
GND
8
PGND
9
LX
Ground. Connect to ground plane.
Power Ground. The inductor charging current flows out of this pin.
Inductor Switching Node. Connect one terminal of the inductor to the
positive terminal of the battery. Connect the second terminal of the
inductor to this pin. The inductor charging current flows into LX,
through the internal charging N-channel FET, and out the PGND pin.
10
VOUT
Output Voltage. The inductor current flows out of this pin during
switch off-time. It is also used as the internal regulator voltage supply.
Connect this pin to the positive terminal of the output capacitor.
Note that the Thermal Pad (Pin 11) should be connected to Ground.
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
FUncTiOnaL DiagRaM
@
@
@
@
@
@
@
@
@
@
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@
@
@
@
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@
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
THeORY OF OPeRaTiOn
Detailed Description
devices, the inductor and input & output filter
capacitors should be soldered with their
ground pins as close together as possible in
a star-ground configuration. The VOUT pin
must be bypassed directly to ground as
close to the SP7648 devices as possible
(within 0.2in or 5mm). The DC-DC converter
and any digital circuitry should be placed on
the opposite corner of the PC board as far
away from sensitive RF and analog input
stages. Noisy traces, such as from the LX
pin, should be kept away from the voltagefeedback VFB node and separated from it
using grounded copper to minimize EMI.
See the SP7648EB Evaluation Board
Manual for PC Board Layout design details.
The SP7648 is a step-up DC-DC converter
with an input voltage operation range from
2.7V to 4.7V. In addition to the main 0.31
internal NMOSFET switch the SP7648 has
an internal synchronous rectifier, thereby
increasing efficiency and reducing the
space and cost of an external diode. An internal inductive-damping switch significantly
reduces inductive ringing for low noise-high
efficiency operation. If the supply voltage
drops below 0.61V the SP7648 goes into
under voltage lockout, thus opening both internal switches. The inductor peak current is
externally programmable to allow for a
range of inductor values.
Circuit Layout
Control Scheme
Printed circuit board layout is a critical part
of a power supply design. Poor designs can
result in excessive EMI on the feedback paths
and on the ground planes with applications
involving high switching frequencies and
large peak currents. Excessive EMI can
result in instability or regulation errors. All
power components should be placed on
the PC board as closely as possible with the
traces kept short, direct, and wide (>50mils
or 1.25mm). Extra copper on the PC board
should be integrated into ground as a pseudoground plane. On a multilayer PC board,
route the star ground using componentside copper fill, then connect it to the internal
ground plane using vias. For the SP7648
Mar16-06 Rev B
A minimum off-time, current limited pulse
frequency modulation (PFM) control
scheme combines the high output power and
efficiency of a pulse width modulation
(PWM) device with the ultra low quiescent
current of the traditional PFM. At low to moderate output loads the PFM control provides
higher efficiency than traditional PWM converters are capable of delivering. At these
loads the switching frequency is determined
by a minimum off-time (TOFF, MIN) and a
maximum on-time (TON, MAX) where:
TOFF < KOFF / (VOUT - VBATT)
TON > KON / VBATT
KOFF = 1.0Vµs
KON = 3.5 Vµs
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
THeORY OF OPeRaTiOn
current limit is not reached as shown in plot
C in Figure 1. The inductor peak current
limit can be programmed by tying a resistor
RLIM
from the RLIM pin to ground where:
At light loads (as shown in plot A in Figure 1)
the charge cycle will last the maximum value
for tON: For a 3V battery this would be as
follows: TON= K ON/ V BATT= 3.5V µS/ 3V =
1.17µS. The current built up in the coil during
the charge cycle gets fully discharged in the
discontinuous conduction mode (DCM).
When the current in the coil has reached
zero, the synchronous rectifier switch is
opened and the voltage across the coil (from
VBATTto LX) is shorted internally to eliminate
inductive ringing. With increasing load (as
shown in plot B in Figure 1) this inductor
damping time becomes shorter, because
the output will quickly drop below its regulation point due to heavier load. If the load
current increases further, the SP7648 enters continuous conduction mode (CCM)
where there is always current flowing in the
inductor. The charge time remains at maximum TONas long as the inductor peak
IPEAK = 1600 / RLIM
When the peak current limit is reached the
charge time is short-cycled. In plot D of
Figure 1, the switch current reaches the
peak current limit during the charge period
which ends the charge cycle and starts
the discharge cycle. However, full load is not
yet achieved because at the end of the
minimum discharge time the output was still
within regulation. Maximum load is reached
when this discharge time has shrunk to
the minimum allowed value TOFFas shown
in Plot E of Figure 1.
Component Selection
inductor current vs. Load
llim
Ton Max.
e
Toff Min.
E. Iripple=Toff* (Vo - Vi)/L
llim
Ton Max.
Ton Max.
Ton Max.
Ton Max.
Toff Min.
Toff Min.
Toff Min.
D
Toff Min.
D. Toff*= (Vo - Vi)/L<Iripple<Ton*Vi/L
llim
C. Iripple=Ton*Vi/L
c
llim
B. Iripple=Ton*Vi/L
A. Iripple=Ton*Vi/L
B
llim
a
Figure 1. Inductor Current vs. Load
Mar16-06 Rev B
Selection of capacitors for SP7648 power
supply circuits can be made through the use
of the Component Selection Table. Capacitor equivalent series resistance (ESR) in
the range of 0.2 to 0.31is a requirement for
obtaining sufficient output voltage ripple for
theSP7648toproperlyregulateunderitsload.
Forexample,intheSP7648applicationcircuit
a 10µF, 10V, X5R, surface mount ceramic
output filter capacitor is used. Ceramic capacitors have an ESR too low to produce enough
output ripple for the SP7648 to regulate the
output; therefore, a 0.331 resistor is added
in series with the 10µF capacitor at the VOUT
pin. Designers should select input and output
capacitorswitharatingexceedingtheinductor
current ripple, which is typically set by the
inductor value and the KONvalue as given in
the following relationship:
IL(RIPPLE) = KON/L, where KON = 3.5V*µS
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
THeORY OF OPeRaTiOn
INDUCTORS - SURFACE MOUNT
Inductor Specification
Series R
Isat
Size LxWxH
Inductor Type
ohms
(A)
(mm)
Wurth Elektronik 744042004
0.070
1.70
4.8x4.8x1.8 Shielded Ferrite Core
TDK SLF6025T-4R7M1R5-PF
0.031
1.50
6.0x6.0x2.5 Shielded Ferrite Core
Coilcraft MSS6122-4R7MX
0.065
1.85
6.1x6.1x2.2 Shielded Ferrite Core
Wurth Elektronik 744042006
0.080
1.50
4.8x4.8x1.8 Shielded Ferrite Core
TDK SLF6025T-6R8M1R3-PF
0.044
1.30
6.0x6.0x2.5 Shielded Ferrite Core
Coilcraft MSS6122-6R8MX
0.100
1.45
6.1x6.1x2.2 Shielded Ferrite Core
CAPACITORS - SURFACE MOUNT
Capacitor Specification
Capacitance
Manufacturer/Part No.
ESR
Ripple Current Size LxWxH
Voltage
Capacitor
(uF)
ohms (max)
10C Rise (A)
(mm)
(V)
Type
10
TDK C2012X5R0J106M
0.020
1.70
2.0x1.2x1.35
6.3
X5R Ceramic
10
Murata GRM21BR60J106KE19L
0.020
1.70
2.0x1.2x1.35
6.3
X5R Ceramic
MOSFETS - SURFACE MOUNT
MOSFET Specification
MOSFET
Manufacturer/Part No.
RDS(on)
Id
Package
MOSFET
type
ohms
(A)
Size
Specifications
NMOS
Vishay Si1400DL
0.190
1.70
SC70-6
20V, Vgs = 2.5V, Pd = 0.5W
30V, Vgs = 2.5V, Pd = 0.5W
NMOS
Fairchild FDN337N
0.070
2.20
SOT23-3
RESISTORS - LOW VALUE SURFACE MOUNT
Resistor Specification
Resistor
Manufacturer/Part No.
Resistance
Pd
Package
Resistor
Ref. Des.
ohms
(W)
Size
Specifications
Rc, R2
Vishay CRCW0603R33F
0.33
0.10
0603
Thick Film 1% or 5%
Rc, R2
Vishay CRCW0603R22F
0.22
0.10
0603
Thick Film 1% or 5%
Note: Components highlighted in boldare those used on the SP7648EB Evaluation Board.
Inductance
(uH)
4.7
4.7
4.7
6.8
6.8
6.8
Manufacturer/Part No.
Manufacturer
Website
www.we-online.de
www.tdk.com
www.coilcraft.com
www.we-online.de
www.tdk.com
www.coilcraft.com
Manufacturer
Website
www.tdk.com
www.murata.com
Manufacturer
Website
www.vishay.com
www.fairchildsemi.com
Manufacturer
Website
www.vishay.com
www.vishay.com
Table 1: Component Selection
For the example, a 10µH inductor would
have an inductor current ripple of 350mA,
while a 4.7µH inductor would have an inductor current ripple value of 740mA. Do not
allow tantalum capacitors to exceed their
ripple-current ratings. An input filter capacitor can reduce peak currents drawn from
the battery and improve efficiency. For
most applications, use the same capacitor
for the input and output.
Low-ESR tantalum capacitors are acceptable provided they meet the ESR requirement of 0.21 to 0.31. In selecting an
inductor, the saturation current specified for
the inductor needs to be greater than the
SP7648 peak current to avoid saturating
the inductor, which would result in a loss of
efficiency and could damage the inductor.
The SP7648 evaluation board uses a Wurth
4.7µH inductor with an ISAT value of 1.7A
and a DCR of 0.0651, which handles the
IPEAK of 1.6A of the SP7648 and will deliver
high efficiencies. Other inductors could be
selected provided their ISAT is greater than
the IPEAKof the SP7648.
Mar16-06 Rev B
VOUT Programming
The SP7648 can be programmed as either
a voltage source or a current source. To
program the SP7648 as voltage source, the
SP7648 requires 2 feedback resistors R1 &
R2 to control the output voltage. To set VOUT
in the voltage mode, use the equation:
R1 = [(VOUT/0.8)-1] * R2, where flash < 0.4V,
R1 = [(VOUT/0.288)-1] * R2, where flash > 1.0V
Using the RLIM Function
The peak inductor current, IPEAK, is pro
grammed externally by the RLIM resistor
connected between the RLIM pin and GND.
The peak inductor current is defined by:
IPEAK= 1600/R LIM
The saturation current specified for the inductor needs to be greater than the peak
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
THeORY OF OPeRaTiOn
the LED. To set the operating current to be
about 200mA in torch mode, the flash pin is
forced low, R2 is selected as 0.8V/ 0.2 = 41,
as shown in the typical application circuit. To
set the operating current to 700mA in flash
mode, the flash pin is forced high, R is
selected as 0.288V/0.411 = 700mA. In reality R in Flash includes the series MOSFET
RDSON and the parallel combination of R2 =
41 shown by the formula:
current to avoid saturating the inductor,
which would result in a loss in efficiency and
could damage the inductor. The SP7648
evaluation board uses a RLIM value of 1K1
for an IPEAK = 1.6A to allow the circuit to
deliver up to 700mA for VIN = 3.3V and VOUT
= 4.2V. Other values could be selected using
the above relationships.
Using the FLASH Control Pin
The SP7648 will regulate the output by the
equations above depending on the state of
the FLASH pin. When the FLASH pin is
low (<0.4V), the internal reference voltage
is defined as 0.8V. When the FLASH pin is
high (>0.4V), the internal reference voltage
is defined as 0.288V. This allows the use of
smaller values for the sense resistor for
current regulation mode. This improves efficiency and reduces the physical size of the
sense resistor. An external MOSFET switch
can be used to change the sense resistor
when changing to the Flash Mode.
R in Flash =
If the SP7648 is powered up before the LED
is plugged in, the circuit will bring the feedback pin to ZeroV and the SP7648 has a
feature to set the output voltage to be 5V.
Once the LED is plugged in, the feedback
pin will go up to 0.8V in torch mode or 0.288V
in flash mode and begin to regulate. The
output voltage will go from 5V to VF+VFB,
where VF is the forward voltage of the LED.
When the LED is open, the feedback pin
voltage will go to ZeroV and the output
voltage will go to 5V which will protect the
part from overvoltage at the output.
High Brightness White LED
One approach to control LED brightness is
to apply a PWM signal to the SHDN input of
the SP7648. In this case, the output current
will be equal to the product of VREF/R1 and
the average duty cycle at the SHDN pin. An
optional 10K1 potentiometer may also be
used for dimming the LED current by varying
the potentiometer between low brightness
and full brightness.
For the high brightness LumiLED white LED
application, the SP7648 is generally programmed as a current source. The bias
resistors R1 and R2 are used to set the
operating current of the white LED with the
equation:
R = VFB/IF
where VFB is 0.8V in torch mode and 0.288V
in flash mode, IF is the operating current of
Mar16-06 Rev B
{R1 X (R2 + Q1RDSON)}
{R1 + R2 + Q1RDSON}
If the FB pin is pulled below 150mV the
output will default to 5V defined by an internal resistor divider.
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
© 2006 Sipex Corporation
TYPicaL PeRFORMance cHaRacTeRiSTicS
SP7648 for Luxeon I
800
100
SP7648 for Luxeon I
90
Flash Mode,
Vf=3.6V
Torch Mode,
Vf=3.2V
Output current (mA)
700
500
Efficiency (%)
600
Flash Mode,
Vf=3.6V
Torch Mode,
Vf=3.2V
400
300
200
80
70
60
100
0
3.0
3.2
3.4
3.6
3.8
4.0
50
4.2
3.0
Vin (V)
SP7648 for AOT(2015HPW1915B)
800
Output current (mA)
Efficiency (%)
500
Flash Mode,
Vf=3.9V
Torch Mode,
Vf=3.3V
400
300
200
3.6
Vin (V)
3.8
4.0
4.2
4.0
4.2
4.0
4.2
Flash Mode,
Vf=3.9V
Torch
Mode,Vf=3.3V
90
600
80
70
60
100
0
50
3.0
3.2
3.4
3.6
Vin (V)
3.8
4.0
4.2
3.0
SP7648 for AOT(6060HPW0305BD)
600
500
3.2
3.4
300
Flash Mode,
Vf=4.2V
200
Torch Mode,
Vf=3.5V
3.8
Flash Mode,
Vf=4.2V
Torch Mode,
Vf=3.5V
90
400
3.6
Vin (V)
SP7648 for AOT(6060HPW0305BD)
100
Efficiency (%)
Output current (mA)
3.4
SP7648 for AOT(2015HPW1915B)
100
700
3.2
80
70
60
100
0
50
3.0
Mar16-06 Rev B
3.2
3.4
3.6
Vin (V)
3.8
4.0
4.2
3.0
3.2
3.4
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
3.6
Vin (V)
3.8
© 2006 Sipex Corporation
TYPicaL PeRFORMance cHaRacTeRiSTicS
Ch1 = SHDN (5V/div)
Ch2 = Vout (1V/div)
Ch4 = Iin (1A/div)
Startup 700mA Flash, Vin = 3.6V, Vout = 3.65V
Startup 200mA Torch, Vin = 3.6V, Vout = 3.9V
Ch1 = Vin (AC)
100mV/div
Ch2 = Vout (AC)
100mV/div
Ripple 700mA Flash, Vin = 3.6V, Vout = 3.65V
Ripple 200mA Torch, Vin = 3.6V, Vout = 3.9V
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
10
© 2006 Sipex Corporation
Package: 10 Pin MSOP
FRONT VIEW
TOP VIEW
D
D/2
ø1
R1
Gauge Plane
e1
R
L2
10
8
9
7
6
ø
E/2
E
Seating Plane
c
ø1
E1
2
1
(L1)
1
2
e
3
4
Seating
Plane
5
A2
A
Pin #1 designator
to be within this
INDEX AREA
(D/2 * E1/2)
A1
10 Pin MSOP
SYMBOL
A1
c
R
R1
ø
ø1
A
A2
b
D
E
E1
e
e1
L
L1
L2
JEDEC MO-187
Dimensions in Millimeters:
Controlling Dimension
MIN
0.00
0.08
0.07
0.07
0º
5º
0.75
0.17
NOM
MAX
0.15
0.23
8º
15º
1.10
0.85
0.95
0.33
3.00 BSC
4.90 BSC
3.00 BSC
0.50 BSC
2.00 BSC
0.40
0.60
0.80
0.95 REF
0.25 BSC
SIPEX Pkg Signoff Date/Rev:
Mar16-06 Rev B
L
SIDE VIEW
b
Variation BA
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
MIN
0.000
0.004
0.003
0.003
0º
5º
0.030
0.007
0.016
NOM
0.034
0.118 BSC
0.193 BSC
0.118 BSC
0.020 BSC
0.079 BSC
0.024
0.037 REF
0.010 BSC
MAX
0.006
0.009
8º
15º
0.043
0.038
0.013
0.032
JL Aug09-05 RevA
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
11
© 2006 Sipex Corporation
Package:
Package:1010Pin
pinDFn
DFN
D
D/2
ø
E/2
A
E
(A3)
A1
Seating Plane
SIDE VIEW
Pin1 Designator
to be within this
INDEX AREA
(D/2 x E/2)
TOP VIEW
D2
D2/2
1
2
3
4
5
INDEX AREA
(D/2 x E/2)
E2/2
E2
Note that Thermal
Pad (Pin 11) should
be connected to
Ground.
K
L
10
9
e
8
7
6
b
BOTTOM VIEW
3x3 10 Pin DFN
SYMBOL
JEDEC MO-229
Dimensions in Millimeters:
Controlling Dimension
NOM
0.90
0.02
0.20 REF
0.20
0º
b
0.18
0.25
D
3.00 BSC
D2
2.20
E
3.00 BSC
E2
1.40
e
0.50 BSC
L
0.30
0.40
SIPEX Pkg Signoff Date/Rev:
A
A1
A3
K
ø
Mar16-06 Rev B
MIN
0.80
0.00
MAX
1.00
0.05
14º
0.30
2.70
1.75
0.50
VARIATION VEED-5
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
MIN
NOM
MAX
0.032
0.036
0.039
0.000
0.001
0.002
0.008 REF
0.008
0º
14º
0.008
0.010
0.012
0.119 BSC
0.087
0.106
0.119 BSC
0.056
0.069
0.020 BSC
0.012
0.016
0.020
JL Aug09-05 / RevA
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
12
© 2006 Sipex Corporation
ORDeRing inFORMaTiOn
Part number
Operating Temperature Range
Package Type
SP7648ER .................................................. -40°C to +85°C ........................................................... 10 Pin DFN
SP7648ER/TR ............................................ -40°C to +85°C .......................................................... 10 Pin DFN
SP7648EU .................................................. -40°C to +85°C ........................................................ 10 Pin MSOP
SP7648EU/TR ............................................ -40°C to +85°C ....................................................... 10 Pin MSOP
Available in lead free packaging. To order add “-L” suffix to part number.
Example: SP7648ER/TR = standard; SP7648ER-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 3,000 for DFN, and 2,500 for MSOP.
Solved by
Sipex Corporation
TM
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex 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.
Mar16-06 Rev B
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
13
© 2006 Sipex Corporation