LM25115MT/NOPB National Semiconductor, LM25115MT/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM25115MT/NOPB
• Description: IC CTRLR SSPR 42V LD REG 16TSSOP
• Manufacturer: National Semiconductor

Specifications of LM25115MT/NOPB

• Pwm Type: Voltage/Current Mode
• Number Of Outputs: 2
• Frequency - Max: 1MHz
• Duty Cycle: 90%
• Voltage - Supply: 5 V ~ 7.5 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-TSSOP
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM25115MT; *LM25115MT/NOPB; LM25115MT

Pin
Pin Descriptions
10
11
12
13
14
15
16
9
-
Exposed Pad
Package
PGND
VBIAS
SYNC
Name
Only)
VCC
(LLP
HO
HS
HB
LO
Synchronization input
Power Ground
Low side gate driver output
Output of bias regulator
High side MOSFET source connection
High side gate driver output
High side gate driver bootstrap rail
Supply Bias Input
Exposed Pad, underside of LLP package Internally bonded to the die substrate. Connect to system
(Continued)
Description
3
A low impedance current input pin. The current into this pin sets
the RAMP capacitor charge current and the frequency of an
internal oscillator that provides a clock for the free-run (DC
input) mode .
Connect directly to the analog ground pin (AGND).
Connect to the gate of the low side synchronous MOSFET
through a short, low inductance path.
Nominal 7V output from the internal LDO bias regulator. Locally
decouple to PGND using a low ESR/ESL capacitor located as
close to controller as possible.
Connect to negative terminal of the bootstrap capacitor and the
source terminal of the high side MOSFET.
Connect to the gate of high side MOSFET through a short, low
inductance path.
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 controller as possible.
Input to the LDO bias regulator and current sense amplifier that
powers internal blocks. Input range of VBIAS is 4.5V to 30V.
ground for low thermal impedance.
Application Information
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