SP6691EB Exar Corporation, SP6691EB Datasheet

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SP6691EB

Manufacturer Part Number
SP6691EB
Description
Display Modules & Development Tools Micro Pwr Boost Reg White LED Driver
Manufacturer
Exar Corporation
Datasheet

Specifications of SP6691EB

Product
Display Modules
Jun26-07 Rev D
The SP6691 is a micro power boost regulator that is specifically designed for powering series
configuration white LED. The part utilizes fixed off time architecture and consumes only 10nA
quiescent current in shutdown. Low voltage operation, down to 1V, fully utilizes maximal battery
life. The SP6691 is offered in a 8 Pin DFN, 5-pin SOT-23 or 5 Pin TSOT package and enables
the construction of a complete regulator occupying < 0.2 in
FEATURES
■ Drives up to 6 LEDs @ 25mA
■ Drives up to 8 LEDs @ 20mA
■ High Output Voltage: Up to 30V
■ Optimized for Single Supply,
■ Operates Down to 1V
■ High Efficiency: Greater Than 75%
■ Low Quiescent Current: 20µA
■ Ultra Low Shutdown Current: 10nA
■ Single Battery Cell Operation
■ Programmable Output Voltage
■ 1 switch (350mV at 350mA)
■ Lead Free, RoHS Compliant Packages:
Micro Power Boost Regulator Series White LED Driver
2.7V - 4.2V Applications
8 Pin DFN, 5 Pin TSOT or 5 Pin SOT23
Solved by
2.7 to 4.2V
4.7µF
TM
Micro Power Boost Regulator Series White LED Driver
C1
SHDN
V
IN
GND
10µH
SP6691
L1
SW
®
FB

APPLICATIONS
■ White LED Driver
■ High Voltage Bias
■ Digital Cameras
■ Cell Phone
■ Battery Backup
■ Handheld Computers
D1
SW
NC
NC
TYPICAL APPLICATION CIRCUIT
FB
2
board space.
C2
1
2
3
4
SP6691
8 Pin DFN
2.2 µF
SP6691
R
b
DESCRIPTION
8
7
6
5
© 2007 Sipex Corporation
NC
SHDN
V
GND
IN

Related parts for SP6691EB

SP6691EB Summary of contents

Page 1

Solved by TM Micro Power Boost Regulator Series White LED Driver FEATURES ■ Drives LEDs @ 25mA ■ Drives LEDs @ 20mA ■ High Output Voltage 30V ■ Optimized for Single Supply, ...

Page 2

V ....................................................................... 15V IN SW Voltage .............................................. -0.4 to 30V FB Voltage ......................................................... 2.5V All other pins ................................... -0 Current into FB ................................................. ±1mA T Max ............................................................. 125°C J Operating Temperature Range ............ -40°C to 85°C Peak Output ...

Page 3

PIN NUMBER PIN NAME GND SHDN Shutdown SHDN 4 Logic Operation can be best understood by referring to the functional diagram above and ...

Page 4

Refer to the typical application circuit, T Vout = 12V Efficiency 100 120 140 Iout (mA) Figure 1. 12V Output Efficiency Vout = 15V Efficiency ...

Page 5

Refer to the typical application circuit, T Vout = 21V Efficiency Iout (mA) Figure 7. 21V Output Efficiency Vout = 24V Efficiency ...

Page 6

Refer to the typical application circuit 1.2 1.8 2.4 3 3.6 Input Voltage (V) Figure 13. Quiescent Current I vs 600 500 400 300 200 100 0 1.2 1.8 2.4 3 ...

Page 7

Refer to the typical application circuit OUT I (0.5A/Div) IN Figure 19. Startup Waveform (V =3.3V =20mA) OUT I (100mA/Div) OUT V (AC) OUT I (0.5A/Div) L Figure 21. Load Step Transient (V =3V, ...

Page 8

Inductor Selection For SP6691, the internal switch will be turned off only after the inductor current reaches the typical dc current limit (I =450mA). How- LIM ever, there is typically propagation delay of 200nS between the time when the current ...

Page 9

Table 3 below shows the R selection for different white b LED currents. For example, to set the operating current to be 20mA selected as 60 shown in the schematic. Table ...

Page 10

Layout Consideration Both the input capacitor and the output capacitor should be placed as close as possible to the IC. This can reduce the copper trace resistance which directly effects the input and output ripples. The feedback resistor network should ...

Page 11

V SHDN SP6691 5 Pin SOT- GND FB Jun26-07 Rev D Micro Power Boost Regulator Series White LED Driver PACKAGE: PINOUTS SP6691 5 Pin TSOT GND NC ...

Page 12

Jun26-07 Rev D Micro Power Boost Regulator Series White LED Driver Package: 8 Pin DFn 2 © 2007 Sipex Corporation ...

Page 13

Jun26-07 Rev D Micro Power Boost Regulator Series White LED Driver Package: 5 Pin SOT-23  © 2007 Sipex Corporation ...

Page 14

Jun26-07 Rev D Micro Power Boost Regulator Series White LED Driver Package: 5 Pin TSOT  © 2007 Sipex Corporation ...

Page 15

Part Number SP6691EK1 .......................................................... -40˚C to +85˚C ............................. 5 Pin TSOT SP6691EK1/TR ..................................................... -40˚C to +85˚C ............................ 5 Pin TSOT SP6691EK ............................................................ -40˚C to +85˚C .......................... 5 Pin SOT-23 SP6691EK/TR ....................................................... -40˚C to +85˚C ......................... 5 Pin SOT-23 SP6691ER ............................................................ ...

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