®
Preliminary
SP7648
Low Reference High Efficiency Boost Regulator
FEATURES
■ True Shutdown
■ 700mA Output Current at 3.3V Input; 4.2V
output
■ 92% Efficiency from 2.7VIN to 3.3VOUT
■ Wide Input Voltage Range: 2.7V to 4.5V
■ 5V Fixed or Adjustable Output
■ 0.3Ω Switch
■ Integrated Synchronous Rectifier:0.3Ω
■ 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
VBATT 1
FLASH
2
NC (Test)
3
RLIM
4
SHDN
5
10 V
OUT
9 LX
SP7648
8 P
GND
10 Pin DFN
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 0.3Ω charging 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
1.0KΩ
LX
VOUT
NC
10µF
470pF
FLASH
GND PGND FB
0.33Ω
D1
1KΩ
R2
FLASH
Date: 7/20/05
R1
Q1
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 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 VBATT Current .............................................................. 220mA
Forward VBATT Current .............................................................. 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 ♦ denotes the specifications which apply over full operating temperature range -40ºC to +85°C, unless
otherwise specified.
PARAMETER
MIN
TYP
MAX
UNITS
♦
CONDITIONS
Input Voltage Operating Range, VBATT
2.7
-
4.5
V
♦
After Startup
Output Voltage Range, VOUT
2.7
-
5.5
V
♦
Under Voltage Lock-out/UVLO
0.5
0.61
0.7
V
♦
Output Voltage, VO
4.6
5.0
5.4
V
♦
Internal Feedback Divider
Shutdown Current into VO, ISDO
-
1
500
nA
♦
VSHDN = ZeroV
Shutdown Current into VBATT, ISDB
-
250
750
nA
♦
VSHDN = ZeroV, VBATT = 2.7V
92
-
%
-
VBATT = 2.7V, IOUT = 200mA, RLIM = 2kΩ
650
800
1600
1000
mA
mA
♦
♦
RLIM = 2kΩ, IPK = 1600/RLIM
RLIM = 1kΩ, IPK = 1600/RLIM
-
800
400
200
-
mA
mA
mA
-
VBATT = 2.7V, RLIM =1kΩ
VBATT = 2.7V, RLIM =2kΩ
VBATT = 2.7V, RLIM = 4kΩ
Minimum Off-Time Constant KOFF
0.5
1.0
1.5
V*µs
♦
KOFF ≤ TOFF (VOUT - VBATT)
Maximum On-Time Constant KON
2.0
3.5
5.0
V*µs
♦
KON ≥ TON (VBATT)
Enable Valid to Output Stable (Note 3)
-
300
500
µs
-
ILOAD = 1mA
NMOS Switch Resistance
-
0.30
0.6
Ω
♦
INMOS = 100mA
Efficiency
Inductor Peak Current Limit, IPK
Output Current (Note 2)
PMOS Switch Resistance
-
0.30
0.6
Ω
♦
IPMOS = 100mA
0.76
0.266
0.8
0.288
0.84
0.310
V
V
♦
♦
External feedback Flash = 0
External feedback Flash = 1
-
1
100
nA
♦
VFB =1.3V
2.0
-
0.5
-
V
♦
♦
VBATT = 2.7V
VBATT = 2.7V
SHDN Input Current
-
1
100
nA
♦
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 VIL
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.
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 Sipex Corporation
PIN DESCRIPTION
PIN NUMBER
PIN NAME
1
VBATT
Battery Voltage. The startup circuitry is powered by this pin. Battery
Voltage is used to calculate switch off time: TOFF = KOFF/ (VOUT VBATT). 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)
4
RLIM
5
SHDN
6
FB
7
GND
8
PGND
9
LX
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.
Date: 7/20/05
DESCRIPTION
No connection. This pin is bonded out for test purposes only and
must be left floating in all applications.
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 9kΩ (for 180mA) to 1.KΩ (for 1.6A).
Shutdown Not. Tie this pin high to VBATT, 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 VOUT and GND for
adjustable output operation.
Ground. Connect to ground plane.
Power Ground. The inductor charging current flows out of this pin.
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
3
© Copyright 2005 Sipex Corporation
FUNCTIONAL DIAGRAM
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 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 0.3Ω
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
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:
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 component-side
copper fill, then connect it to the internal
ground plane using vias. For the SP7648
Date: 7/20/05
TOFF < KOFF / (VOUT - VBATT)
TON > KON / VBATT
KOFF = 1.0Vµs
KON = 3.5 Vµs
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 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 = KON / VBATT = 3.5VµS/ 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
VBATT to 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 TON as 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 TOFF as 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.
D
Toff Min.
D. Toff*= (Vo - Vi)/L<Iripple<Ton*Vi/L
llim
Ton Max.
Toff Min.
C. Iripple=Ton*Vi/L
C
llim
Ton Max.
Toff Min.
B. Iripple=Ton*Vi/L
B
llim
Ton Max.
Toff Min.
A. Iripple=Ton*Vi/L
A
Figure 1. Inductor Current vs. Load
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 0.3Ω is a requirement for
obtaining sufficient output voltage ripple for
the SP7648 to properly regulate under its
load. For example, in the SP7648 application circuit 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 0.33Ω
resistor is added in series with the 10µF
capacitor at the VOUT pin. Designers should
select input and output capacitors with a
rating exceeding the inductor current ripple,
which is typically set by the inductor value
and the KON value as given in the following
relationship:
IL(RIPPLE) = KON/L, where KON = 3.5V*µS
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 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 bold are 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 0.2Ω to 0.3Ω. 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 0.065Ω, 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 IPEAK of the SP7648.
Date: 7/20/05
______________ 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 programmed externally by the RLIM resistor
connected between the RLIM pin and GND.
The peak inductor current is defined by:
IPEAK = 1600/RLIM
The saturation current specified for the inductor needs to be greater than the peak
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
7
© Copyright 2005 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 = 4Ω,
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/0.41Ω = 700mA. In reality R in Flash includes the series MOSFET
RDSON and the parallel combination of R2 =
4Ω 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 1KΩ
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
R in Flash =
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.
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 10KΩ 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
If the FB pin is pulled below 150mV the
output will default to 5V defined by an internal resistor divider.
where VFB is 0.8V in torch mode and 0.288V
in flash mode, IF is the operating current of
Date: 7/20/05
{R1 X (R2 + Q1RDSON)}
{R1 + R2 + Q1RDSON}
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
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© Copyright 2005 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
50
3.0
3.2
3.4
3.6
3.8
4.0
4.2
3.0
3.2
3.4
Vin (V)
SP7648 for AOT(2015HPW1915B)
800
Output current (mA)
Efficiency (%)
Flash Mode,
Vf=3.9V
Torch Mode,
Vf=3.3V
400
300
200
4.0
4.2
4.0
4.2
4.0
4.2
Flash Mode,
Vf=3.9V
Torch
Mode,Vf=3.3V
90
500
3.8
SP7648 for AOT(2015HPW1915B)
100
700
600
3.6
Vin (V)
80
70
60
100
0
50
3.0
3.2
3.4
3.6
3.8
4.0
4.2
3.0
3.2
3.4
Vin (V)
SP7648 for AOT(6060HPW0305BD)
500
Flash Mode,
Vf=4.2V
Torch Mode,
Vf=3.5V
90
400
300
Flash Mode,
Vf=4.2V
200
Torch Mode,
Vf=3.5V
3.8
SP7648 for AOT(6060HPW0305BD)
100
Efficiency (%)
Output current (mA)
600
3.6
Vin (V)
80
70
60
100
0
50
3.0
3.2
3.4
3.6
3.8
4.0
4.2
3.0
3.2
Vin (V)
Date: 7/20/05
3.4
3.6
3.8
Vin (V)
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
9
© Copyright 2005 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
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
10
© Copyright 2005 Sipex Corporation
PACKAGE: 10 PIN DFN
10-PIN 3X3MM DFN PACKAGE OUTLINE
T
JEDEC DOCUMENT MO-229 VARIATION VEED-5
DIMENSIONS IN MILLIMETERS
DIMENSIONS IN INCHES
(CONTROLLING UNIT)
(CONVERT UNIT 1MM = 0.0394INCH)
SYMBOL
MINIMUM
NOMINAL
MAXIMUM
MINIMUM
NOMINAL
A
0.80
0.90
1.00
0.032
0.035
0.039
A1
0.00
0.02
0.20 REF
0.05
0.000
0.001
0.008 REF
0.002
0.18
0.25
0.50 BSC
0.30
0.007
0.010
0.020 BSC
0.012
e
D
3.00 BSC
E
3.00 BSC
A3
b
MAXIMUM
0.118 BSC
0.118 BSC
D2
2.20
--
2.70
0.087
--
E2
1.40
--
1.75
0.055
--
0.106
0.069
L
0.30
0.40
0.50
0.012
0.016
0.020
K
0.20
--
--
0.008
--
--
T
0o
14o
0o
-10
14o
N
-10
ND
5
5
NOTE 1: PIN #1 INDICATOR MUST BE WITHIN THIS AREA AND CAN BE ANY SHAPE
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
11
© Copyright 2005 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 2,500 for DFN and MSOP.
CLICK HERE TO ORDER SAMPLES
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
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.
Date: 7/20/05
SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator
12
© Copyright 2005 Sipex Corporation