MAX1575 Maxim Integrated Products, MAX1575 Datasheet - Page 8

• Manufacturer Part Number: MAX1575
• Description: White LED 1x/1.5x Charge Pump
• Manufacturer: Maxim Integrated Products

White LED 1x/1.5x Charge Pump
for Main and Sub-Displays
Figure 3. Driving Fewer than Six White LEDs
Table 1. Recommended Components
8
C
DESIGNATION
IN
_______________________________________________________________________________________
, C
2.7V TO 5.5V
AND DIMMING
AND DIMMING
D1–D6
ENABLE MAIN
OUT
R
ENABLE SUB
SET
, C1, C2
1µF
ON/OFF
ON/OFF
R
SET
IN
GND
ENM
ENS
SET
As required
VALUE
C1P
C2P
MAX1575
1µF
—
1µF
1µF
C1N
C2N
LED1
LED2
LED3
LED4
LED5
LED6
OUT
MANUFACTURER
Taiyo Yuden
Panasonic
Kamaya
1µF
Murata
MAIN
Nichia
SUB
TDK
Use only ceramic capacitors with an X5R, X7R, or better
dielectric. See
The MAX1575 is a high-frequency switched-capacitor
voltage regulator. For best circuit performance, use a
solid ground plane and place C
as close to the MAX1575 as possible. Connect GND to
the exposed paddle directly under the IC. Refer to the
MAX1575 evaluation kit for an example.
TRANSISTOR COUNT: 5738
PROCESS: BiCMOS
GRM155R60J105K
C1005X5R0J105M
JMK107BJ105KA
NSCW215T
PART
—
Table
PC Board Layout and Routing
1 for a list of recommended parts.
1µF ±10%, 6.3V X5R ceramic
capacitors (0402)
1µF ±10%, 6.3V X5R ceramic
capacitors (0603)
1µF ±20%, 6.3V X5R ceramic
capacitors (0402)
White LEDs
1% resistor
Component Selection
Chip Information
DESCRIPTION
IN
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, C
OUT
, C1, and C2