MAX1573ETE+ Maxim Integrated Products, MAX1573ETE+ Datasheet - Page 4

• Manufacturer Part Number: MAX1573ETE+
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, White LEDr

Specifications of MAX1573ETE+

• Constant Current: Yes
• Topology: Linear (LDO), PWM, Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 28mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details

White LED 1x/1.5x Charge Pump in
UCSP and Thin QFN
(V
4
TQFN
IN
10
11
12
1
2
3
4
5
6
7
8
9
_______________________________________________________________________________________
= 3.6V, EN1 = EN2 = IN, C
PIN
UCSP
C4
D4
C3
D3
D2
B2
A2
A3
A4
B4
—
—
V
V
OUT
EN_
I
IN
NAME
LED2
LED1
LED4
LED3
GND
OUT
N.C.
N.C.
C2P
EN1
EN2
SET
STARTUP AND SHUTDOWN RESPONSE
Transfer Capacitor 2 Positive Connection. See the Component Selection section for capacitor value.
Output. Bypass to GND with a 1µF ceramic capacitor. Connect to the anodes of all the LEDs. OUT is
high impedance during shutdown.
Enable, Dimming Control Input 1. EN1 and EN2 control shutdown and the LED current. See Table 1.
No Connection
Enable, Dimming Control Input 2. EN1 and EN2 control shutdown and the LED current. See Table 1.
Bias-Current Set Input. Connect a resistor from SET to GND to set the LED bias current (I
600mV/R
LED2 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest
voltage on any of the LED_ inputs. Connect LED2 to the cathode of one output LED. Connect LED2 to
IN if this LED is not populated.
LED1 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest
voltage on any of the LED_ inputs. Connect LED1 to the cathode of one output LED. Connect LED1 to
IN if this LED is not populated.
LED4 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest
voltage on any of the LED_ inputs. Connect LED4 to the cathode of one output LED. Connect LED4 to
IN if this LED is not populated.
LED3 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest
voltage on any of the LED_ inputs. Connect LED3 to the cathode of one output LED. Connect LED3 to
IN if this LED is not populated.
Ground
No Connection
IN
= C1 = C2 = C
500μs/div
SET
LED_ = 4
EN1 = EN2
.
✕
MAX1573 toc10
17mA
Typical Operating Characteristics (continued)
OUT
= 1µF, R
5V/
div
50mA/
div
2V/
div
SET
= 7.50kΩ, T
FUNCTION
V
I
ENI1
OUT
A
= +25°C, unless otherwise noted.)
DIMMING RESPONSE
5μs/div
Pin Description
EN2 = IN
MAX1573 toc11
2V/
div
50mA/
div
SET
). I
SET
=