AAT2845AIML-EE-T1 AnalogicTech, AAT2845AIML-EE-T1 Datasheet - Page 2

• Manufacturer Part Number: AAT2845AIML-EE-T1
• Description: Four-Channel Backlight Driver with Dual LDOs
• Manufacturer: AnalogicTech

Pin Descriptions
Pin Configuration
2
Pin #
EP
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
Symbol
EN/SET
ENLDO
PGND
LDOB
LDOA
GND
OUT
CBP
FBA
FBB
C2+
C1+
C2-
C1-
D2
D1
D4
D3
IN
IN
Function
Current sink input #2.
Current sink input #1.
Output of LDO B. Connect a 2.2µF or larger ceramic capacitor to ground.
Input power supply for charge pump. Requires a 1µF or larger ceramic capacitor connected
between this pin and ground.
Power ground.
Input power pin for both LDOs. Connect a 1µF or larger ceramic capacitor from this pin to
PGND.
Feedback pin of LDO A. Regulated at 1.2V.
Output of LDO A. Connect a 2.2µF or larger ceramic capacitor to ground.
Flying capacitor 2 negative terminal.
Flying capacitor 2 positive terminal. Connect a 1µF ceramic capacitor between C2+ and C2-.
Charge pump output to drive load circuit. Connect a 1µF or larger ceramic capacitor between
this pin and PGND.
Flying capacitor 1 negative terminal.
Flying capacitor 1 positive terminal. Connect a 1µF ceramic capacitor between C1+ and C1-.
S
Enable pin for LDO A and B.
Current sink input #4.
Current sink input #3.
Ground.
Bypass pin for the internal reference. Connect a 0.1µF ceramic capacitor from this pin to GND.
Feedback pin of LDO B. Regulated at 1.2V.
Exposed paddle (bottom); connect to PGND as closely as possible to the device.
2
Cwire control pin for backlighting.
PGND
Four-Channel Backlight Driver with Dual LDOs
LDOB
D2
D1
IN
IN
1
2
3
4
5
6
TQFN34-20
(Top View)
16
15
14
13
12
11
D4
ENLDO
EN/SET
C1+
C1-
OUT
AAT2845A
2845A.2007.05.1.0