IC manufacturers Texas Instruments

IC manufacturers (99)

Texas Instruments TPS62914

17V VIN, 4.5A low-noise low-ripple buck converter with integrated ferrite-bead filter compensation

Overview

TopologyBuck Converter
Input voltage3-17 V
Switching frequency1000-2200 kHz
Output 11.2 V / 4.5 A
IC revisionC

Description

The TPS6291x devices are a family of high-efficiency, low noise, and low ripple current mode synchronous buck converters. The devices are designed for noise sensitive applications that normally use an LDO for post regulation such as high-speed ADCs, clock and jitter cleaner, serializer, de-serializer, and radar applications.To reduce the output voltage ripple, the device loop compensation is designed to operate with an optional second-stage ferrite bead L-C filter. Low-frequency noise levels, similar to a low-noise LDO, are further achieved by filtering the internal voltage reference with a capacitor connected to the NR/SS pin. Combined, these features allow for an output voltage ripple below 10µVRMS.The device operates at a fixed switching frequency of 2.2MHz, 1.4MHz, or 1MHz, and can be synchronized to an external clock. An optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.

Features

Low output 1/f noise < 20µVRMS(100Hz to 100kHz)Low output voltage ripple < 10µVRMS after ferrite beadHigh PSRR of > 65dB (up to 100kHz)2.2MHz, 1.4MHz, or 1.0MHz fixed frequency peak current mode controlSynchronizable with external clock (optional)Integrated loop compensation supports ferrite bead for second stage L-C filter with 30dB attenuation (optional)Spread spectrum modulation (optional)3.0V to 17V input voltage range0.8V to 5.5V output voltage range25mΩ/7mΩ RDSonOutput voltage accuracy of ±1% over temperaturePrecise enable input allowsUser-defined undervoltage lockoutExact sequencingAdjustable soft startPower-good outputOutput discharge (optional)–40°C to 150°C junction temperature range

  1. mm × 3.0mm QFN with 0.5mm pitchCreate a custom design using the TPS6291x with the WEBENCH Power Designer

Typical applications

  • Aerospace and defense (radar, avionics)
  • Telecom infrastructure
  • Medical
  • Test and measurement

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
VOP
(V)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR
(A)
Z @ 1 GHz
(Ω)
H
(mm)
Type Samples
74438356010SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-MAPI SMT Power Inductor 1 10.1 11.5 12 55 80 SMT 7.2 2
74438357010SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-MAPI SMT Power Inductor 1 10.25 12.5 11.6 59 80 SMT 7.4 3.1
7427922808SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-MPSB EMI Multilayer Power Suppression Bead 2.5 SMT 8 25 1930 MHz 9.5 24 0.8 High Current
74279221100SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-MPSB EMI Multilayer Power Suppression Bead 1 SMT 10 41 2178 MHz 10.5 28 1.1 High Current
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
VOP
(V)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR
(A)
Z @ 1 GHz
(Ω)
H
(mm)
Type Samples