MAX1574ETB+T Maxim Integrated Products, MAX1574ETB+T Datasheet - Page 8

• Manufacturer Part Number: MAX1574ETB+T
• Description: IC LED DRVR WHITE BCKLGT 10-TDFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1574ETB+T

• Constant Current: Yes
• Topology: Linear (LDO), Switched Capacitor (Charge Pump)
• Number Of Outputs: 3
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 60mA
• Internal Switch(s): Yes
• Efficiency: 83%
• Number Of Segments: 3
• Low Level Output Current: 60 mA
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 2 mA
• Maximum Power Dissipation: 1454 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

180mA, 1x/2x, White LED Charge Pump
in 3mm x 3mm TDFN
Figure 2. Functional Diagram and Typical Application Circuit
Figure 3. Using the MAX1574 to Drive Fewer Than Three LEDs
8
_______________________________________________________________________________________
ON/OFF AND
2.7V TO 5.5V
DIMMING
2.7V TO 5.5V
1µF
CONTROL AND
OFF
DIMMING
ENABLE
1µF
C
R
IN
SET
IN
GND
EN
SET
ON
CP
MAX1574
0.22µF
IN
EN
SET
CN
MAX1574
LED1
LED2
LED3
CONTROLLED-CURRENT
OUT
CONTROL AND
ERROR
AMP2
REFERENCE
MIRROR
1µF
1x/2x REGULATING CHARGE PUMP
0.18V
0.6V
CP
ERROR
0.22µF OR 0.47µF
AMP1
C1
CN
SELMIN
TRANSISTOR COUNT: 6063
PROCESS: BiCMOS
GND
OVD
1.25V
Chip Information
LED1
LED2
LED3
OUT
C
1µF
D1
D2
D3
OUT