LM2754SQEV National Semiconductor, LM2754SQEV Datasheet - Page 2

• Manufacturer Part Number: LM2754SQEV
• Description: BOARD EVALUATION LM2754SQ
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM2754SQEV

• Current - Output / Channel: 800mA
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 5.1V
• Features: Charge Pump
• Voltage - Input: 2.7 ~ 5.5V
• Utilized Ic / Part: LM2754
• Core Chip: LM2754
• Topology: Charge Pump
• No. Of Outputs: 1
• Output Current: 800mA
• Input Voltage: 2.8V To 5.5V
• Kit Contents: Board
• Development Tool Type: Hardware - Eval/Demo Board
• Lead Free Status / RoHS Status: Not applicable / Not applicable

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Connection Diagram
Pin Descriptions
Ordering Information
12, 13, 14, 15
Order Number
1, 2, 7, 5
9, 16, 17
LM2754SQX
LM2754SQ
10, 11
23,24
4, 6
Pin
22
21
20
19
18
8
3
Note: EN, T/F, TX, and SEL pins each have a 500kΩ resistor connected internally to GND
C
D1, D2, D3, D4*
1
+, C
No Connect
I
SET1
GND
Name
V
V
GND
1
SEL
T/F
INSW
V
EN
-, C
TX
OUT
, I
IN
Package Description
24-pin No-Pullback Leadless Leadframe Package (LLP-24)
SW
SET2
2
+, C
No-Pullback
2
LLP-24
- Flying Capacitor Connections.
Input Voltage Connection for Switch Array. Pins 23 and 24 are connected
internally on the die. Connect V
Input Voltage Connection. Connect V
Output Voltage. Connect to LED Anodes.
Regulated Current Sink Inputs. (* See SEL PIN description)
Switch Array Ground Connection. Connect GND and GND
Ground Connection. Connect GND and GND
Enable Control Pin. Logic High = Normal Operation in Torch Mode.
Logic Low = Device Shut-Down. (See Note)
Torch/Flash Control Pin. Logic High = Flash Mode. Logic Low = Torch Mode.
Device must be enabled for Torch or Flash to operate. (See Note)
Current Set Resistor Connections. Connect 1% resistors to ground to set the
desired current through the LEDs. LED current is approximated by the
equation: 800 x (1.25V ÷ R). This equation corresponds to the current through
one current sink. Total LED current is equal to the sum of currents through all
current sinks connected to the LED. The equation used for Torch (I
Flash (I
RF PA synchronization control pin. Logic High = Force Torch Mode. Logic Low
= Normal Operation. (See Applications Information section for the full
operational description) (See Note)
D
D
Do not connect to any node.
4
4
Control Pin. Logic Low = Normal 4-LED Operation. Logic High = Disable
LED Input. Connect D
NS Package Number SQA24A
SET2
4mm x 4mm x 0.8mm
) resistors are the same.
LM2754
2
Package Marking
4
to V
UZXYTT
LM2754
OUT
IN
Description
and V
when not used. (See Note)
IN
and V
INSW
SW
pins together.
INSW
pins together.
Supplied as Tape and Reel
pins together.
SW
(Units)
20202802
1000
4500
pins together.
SET1
) and