LM5116MH/NOPB National Semiconductor, LM5116MH/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM5116MH/NOPB
• Description: IC CTRLR SYNCH BUCK 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM5116MH/NOPB

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.22 ~ 80 V
• Current - Output: 20A
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Input: 6 ~ 100 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Dc To Dc Converter Type: Synchronous Buck Controller
• Pin Count: 20
• Input Voltage: 6 to 100V
• Output Voltage: 1.215 to 80V
• Output Current: 3.5A
• Package Type: TSSOP EP
• Mounting: Surface Mount
• Operating Temperature Classification: Automotive
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• For Use With: LM5116-12EVAL - BOARD EVALUATION FOR LM5116-12LM5116EVAL - BOARD EVALUATION LM5116
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant
• Other names: LM5116MH

Pin
EP
12
13
14
15
16
17
18
19
20
PGND
VCCX
Name
CSG
VCC
SW
HO
CS
LO
HB
EP
Description
Current sense amplifier input. Connect to the top of the current sense resistor or the drain of the low-sided MOSFET
if R
Current sense amplifier input. Connect to the bottom of the sense resistor or the source of the low-side MOSFET if
R
Power ground. Connect to AGND through the exposed pad ground connection under the LM5116.
Connect to the gate of the low-side synchronous MOSFET through a short, low inductance path.
Locally decouple to PGND using a low ESR/ESL capacitor located as close to the controller as possible.
Optional input for an externally supplied VCC. If VCCX > 4.5V, VCCX is internally connected to VCC and the internal
VCC regulator is disabled. If VCCX is unused, it should be connected to ground.
High-side driver supply for bootstrap gate drive. Connect to the cathode of the bootstrap diode and the positive
terminal of the bootstrap capacitor. The bootstrap capacitor supplies current to charge the high-side MOSFET gate
and should be placed as close to the controller as possible.
Connect to the gate of the high-side synchronous MOSFET through a short, low inductance path
Switch node. Connect to the negative terminal of the bootstrap capacitor and the source terminal of the high-side
MOSFET.
Exposed pad. Solder to ground plane.
DS(ON)
DS(ON)
current sensing is used.
current sensing is used.
3
www.national.com