Duty Cycle (Max)
:
Mounting Style
: SMD/SMT
Maximum Operating Temperature
: + 125 C
Number of Outputs
: 2
Output Current
: 20 A
Package / Case
: TSSOP-28
Input Voltage
: 4.5 V to 36 V
Switching Frequency
: 200 KHz
Output Voltage
: 1.3 V to 32.4 V
Pinout
DescriptionThe LM5642MTCX/NOPB is one kind of high voltage, dual synchronous buck converter that consists of two current mode synchronous buck regulator contr-ollers operating 180° out of phase with each other at a normal switching frequency of 200kHz. It can be used in embedded computer systems, navigation systems, telecom systems, set-top boxes, webPAD and point of load power architectures. It also features analog soft-start circuitry that is independent of the output load and output capacitance making the soft-start behavior more predictable and controllable than traditional soft-start circuits.
Features of the LM5642MTCX/NOPB are:(1)adjustable cycle-by-cycle current limit;(2)input under-voltage lockout;(3)output over-voltage latch protection;(4)configurable for single output parallel operation;(5)current mode control with or without a sense resistor;(6)adjustable output from 1.3V to 90% of Vin;(7)50A shutdown current;(8)two synchronous buck regulators;(9)180° out of phase operation;(10)independent enable/soft-start pins allow simple sequential startup configuration.
The absolute maximum ratings of the LM5642MTCX/NOPB can be summarized as:(1)ESD Rating:2 kV;(2)ambient storage temp. range:-65°C to +150°C;(3)power dissipation TSSOP (TA=25°C):1.1W;(4)power dissipation eTSSOP (TA=25°C):3.4W;(5)CBOOT2:+0.3V;(6)VIN, ILIM1, ILIM2, KS1, KS2:-0.3V to 38V;(7)SW1, SW2, RSNS1, RSNS2:-0.3 to (VIN + 0.3)V;(8)FB1, FB2, VDD1, VDD2:-0.3V to 6V;(9)SYNC, COMP1, COMP2, UV Delay:-0.3V to (VLIN5+0.3)V.If you want to know more information such as the electrical characteristics about the LM5642MTCX/NOPB, please download the datasheet in www.seekic.com or www.chinaicmart.com.
Parameters: | Technical/Catalog Information | LM5642MTCX/NOPB |
| Vendor | National Semiconductor |
| Category | Integrated Circuits (ICs) |
| Type | Step-Down (Buck) |
| Number of Outputs | 2 |
| Voltage - Input | 4.5 ~ 36 V |
| Voltage - Output | 1.3 ~ 35 V |
| Current - Output | 20A |
| Power - Output | 1.1W |
| Package / Case | 28-TSSOP |
| Packaging | Tape & Reel (TR) |
| Internal Switch(s) | No |
| Synchronous | Yes |
| Rds (On) | - |
| Operating Temperature | -40°C ~ 125°C |
| Frequency - Switching | 150kHz ~ 250kHz |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | LM5642MTCX NOPB
LM5642MTCXNOPB
LM5642MTCX ND
LM5642MTCXND
LM5642MTCX
|
LM5642MTCX/NOPB Data Sheet
