ADP5501 Analog Devices, ADP5501 Datasheet - Page 6

• Manufacturer Part Number: ADP5501
• Description: Programmable Current Backlight Driver with Ambient Light Sensor Input
• Manufacturer: Analog Devices

Specifications of ADP5501

• Vin Range: 2.7 to 5.5V
• Vout (v): 24 to 27
• Synchronous: No
• Package: 24-Lead LFCSP
• Led Configuration: Serial
• Topology: Inductive
• I2c Support: Yes
• Max Iout (ma): 30mA
• Brightness Control: I2C
• Switching Frequency: 1MHz
• Over Volt Protection (v): 24V

ADP5501
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Mnemonic
PGND
SW
INT
SDA
SCL
NC
NC
NC
NC
NC
NC
LED1
LED2
LED0
RST
VDDIO
CMP_IN
GND
GND
CAP_OUT
VBAT
BST
BL_SNK
GND
EPAD
Power Switch Output to Ground.
Power Switch Input.
Processor Interrupt, Active Low, Open Drain. INT should be pulled up to VDDIO.
I
I
No Connect.
No Connect.
No Connect.
No Connect.
LED 1 Current Sink. LED1 can be used with LED0 and LED2 as RGB.
LED 2 Current Sink. LED2 can be used with LED1 and LED0 as RGB.
LED 0 Current Sink. LED0 can be used with LED1 and LED2 as RGB.
Reset Input, Active Low. This input signal resets the device to the power-up default conditions. It must be driven
low for a minimum of 75 μs (typical) to be valid.
Supply Voltage for the I/O Pin. The output pin can be 1.8 V to 3.3 V or VBAT, whichever is smaller. If VDDIO = 0,
the device goes into full shutdown mode.
Input for Ambient Light Sensing.
Ground.
Ground.
Capacitor for Internal 2.7 V LDO. A 1 μF capacitor must be connected between this pin and ground. Do not use
this pin to supply external loads.
Main Supply Voltage for the IC (2.7 V to 5.5 V).
Overvoltage Monitor Input for the Boost Converter.
Backlight Current Sink.
Ground.
The exposed pad must be connected to ground.
Description
No Connect.
No Connect.
2
2
C-Compatible Serial Data Line (Open Drain Requires External Pull-Up) to VDDIO.
C-Compatible Serial Clock Line (Open Drain Requires External Pull-Up) to VDDIO.
PGND
NOTES
1. NC = NO CONNECT.
2. EXPOSED PAD MUST BE CONNECTED
SDA
SCL
TO GROUND.
SW
INT
NC
1
2
3
4
5
6
Figure 3. Pin Configuration
Rev. 0 | Page 6 of 28
(Not to Scale)
ADP5501
TOP VIEW
PIN 1
INDICATOR
18 GND
17 CMP_IN
16 VDDIO
15 RST
14 LED0
13 LED2