MAX1574ETB+T Maxim Integrated Products, MAX1574ETB+T Datasheet - Page 4

• 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
(Circuit of Figure 2, V
4
-0.2
-0.4
-0.6
-0.8
-1.0
_______________________________________________________________________________________
1.0
0.8
0.6
0.4
0.2
0
2.7
3.1
vs. INPUT SUPPLY VOLTAGE
LED CURRENT MATCHING
INPUT SUPPLY VOLTAGE (V)
V
3.5
OUT
V
I
IN
IN
IN
3.9
= 3.6V, EN = IN, driving three white LEDs, T
OPERATING WAVEFORMS (1x)
4.3
4.7
I
LED
400ns/div
5.1
= 8mA
5.5
MAX1574 toc07
Typical Operating Characteristics (continued)
8.20
8.15
8.10
8.05
8.00
7.95
7.90
7.85
7.80
V
V
OUT
I
EN
IN
-40
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
50mA/div
0mA
LED CURRENT vs. TEMPERATURE
-15
STARTUP AND SHUTDOWN
TEMPERATURE (°C)
10
A
1ms/div
= +25°C, unless otherwise noted.)
35
60
MAX1574 toc09
V
OUT
V
I
IN
IN
85
5V/div
100mA/div
0mA
2V/div
0V
OPERATING WAVEFORMS (2x)
100
10
1
1
100% BRIGHTNESS
SETTING
400ns/div
LED CURRENT vs. R
10
R
SET
MAX1574 toc08
(kΩ)
100
50mV/div
AC-COUPLED
20mV/div
AC-COUPLED
50mA/div
0mA
SET
1000