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SC618ULTRT

P1-P3P4-P6P7-P9P10-P12P13-P13
POWER MANAGEMENT
1
SC618
Charge Pump Flash LED
Driver with Safety Timer
Features
Flash and spotlight — two selectable modes
Flash mode — up to 700mA output
Flash mode — 500mA max output (over rated voltage,
temperature, and load conditions)
Flash mode safety timer shut-o — 1 second
Spotlight mode set to 40% of  ash current
Spotlight mode — up to 280mA output
Spotlight mode —1x mode (under most conditions)
for best efficiency
Input range — 3.0V to 5.25V
External  ash control pin for synchronization to a cam-
era module or graphics controller
Short-circuit, over-voltage, and over-temperature pro-
tection
Soft-start functionality
Separate  ash and spotlight control inputs for maxi-
mum versatility
Ultra-thin package MLPD-UT-10 — 3mm x 3mm x
0.6mm
Applications
Mobile camera phones
Digital cameras
PDAs with built-in cameras
Description
The SC618 is a high-current charge pump designed spe-
cifically for use with white LEDs used in camera flash
applications. Only two small bucket capacitors are required
to develop the output drive, providing a low EMI solution
compared to inductive boost regulators.
The SC618 has two modes of operation:  ash mode and
spotlight mode. In  ash mode, the SC618 is capable of
delivering 500mA of regulated current for a duration of
500ms or up to 700mA for a reduced duration. A safety
timer is also included to ensure the LED cannot be left on
inde nitely and overheat. In spotlight mode the SC618
outputs 40% of the  ash mode current and can remain
enabled continuously.
An external resistor is connected in series with the LED to
set the current. In  ash mode, this resistor can dissipate
up to 175mW, reducing the power dissipation require-
ment of the SC618. The  ash input overrides the control
input to make sure the  ash function is activated .
The SC618 ultra-thin package provides both a low pro le
and high thermal e ciency.
SC618
VIN
C2-
C2+
C1-
C1+
VOUT
FLASH
CTRL
GND
ISET
1μF
1μF
FLASH
CTRL
1μF
R
SET
10μF
V
BAT
White LED
Typical Application Circuit
February 6, 2008
NOT RECOMMENDED FOR NEW DESIGN
NOT RECOMMENDED
FOR NEW DESIGN
SC618
2
Pin Con guration
Marking Information
Ordering Information
Device Package
SC618ULTRT
(1)(2)
MLPD-UT-10 3×3
SC618EVB Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Lead-free package only. Device is WEEE and RoHS compliant.
TOP VIEW
T
10
C2+
1
VIN
2
C2-
3
GND
4
C1-
5
FLASH
9
VOUT
8
C1+
7
CTRL
6
ISET
618
yyww
xxxx
MLPD-UT-10; 3x3, 10 LEAD
θ
JA
= 40°C/W
yyww = Date code
xxxx = Semtech Lot Number
NOT RECOMMENDED FOR NEW DESIGN
NOT RECOMMENDED
FOR NEW DESIGN
SC618
3
Exceeding the above speci cations may result in permanent damage to the device or device malfunction. Operation outside of the parameters
speci ed in the Electrical Characteristics section is not recommended.
NOTES:
(1) Tested according to JEDEC standard JESD22-A114-B.
(2) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Absolute Maximum Ratings
VIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.5
VOUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.5
C1+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V
OUT
+ 0.3)
Pin Voltage - All Other Pins (V) . . . . . . -0.3 to (V
IN
+ 0.3)
Circuit Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Protection Level
(1)
(kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Ambient Temperature Range (°C) . . . . . . . . . . . . -40 to +85
Thermal Information
Thermal Resistance, Junction to Ambient
(2)
(°C/W) . . . .
40
Junction Temperature Range (°C) . . . . . . . . . . . . -40 to +150
Storage Temperature Range (°C) . . . . . . . . . . . . . -60 to +150
Peak IR Re ow Temperature (10s to 30s) (°C) . . . . . . . +260
Unless otherwise speci ed: T
A
= 25°C for TYP, -40°C to +60°C for MIN and MAX; C
BUCKET
= C
OUT
= 1.0F (ESR < 0.1); C
IN
= 10.0F; V
IN
= 3.0V to 5.25V;
V
OUT
= 2.8V to 4.25V; R
SET
= 0.5 (0.1%).
Parameter Symbol Conditions Min Typ Max Units
Output Current
I
OUT
FLASH high, R
SET
= 0.357Ω
3.7V < V
IN
< 4.2V, V
OUT
= 3.7V
(1)
700
mA
FLASH high, R
SET
= 0.5Ω
3.3V < V
IN
< 4.2V
2.8V < V
OUT
< 4.25V
460 500 540
FLASH low, CTRL high, R
SET
= 0.357Ω
3.7V < V
IN
< 4.2V, V
OUT
= 3.4V
(1)
280
FLASH low, CTRL high, R
SET
= 0.5Ω
3.0V < V
IN
< 4.5V
2.8V < V
OUT
< 4.5V
170 200 230
ISET Reference Voltage
V
ISET
FLASH high, R
SET
= 0.5Ω
3.3V < V
IN
< 4.2V
2.8V < V
OUT
< 4.25V
230 250 270
mV
FLASH low, CTRL high, R
SET
= 0.5Ω
3.0V < V
IN
< 4.5V
2.8V < V
OUT
< 4.5V
85 100 115
Quiescent Current I
Q
FLASH high 3.4 5.0 mA
FLASH low, CTRL high 2.0 4.5 mA
FLASH low, CTRL low 0.1 2.0 µA
Electrical Characteristics
NOT RECOMMENDED FOR NEW DESIGN
NOT RECOMMENDED
FOR NEW DESIGN
P1-P3P4-P6P7-P9P10-P12P13-P13

SC618ULTRT

Mfr. #:
Buy SC618ULTRT
Manufacturer:
Semtech
Description:
IC LED DRIVER RGLTR 500MA 10MLPD
Lifecycle:
New from this manufacturer.
Delivery:
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