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LTC1929IG-PG Datasheet

  • LTC1929IG-PG

  • Analog IC

  • 28頁

  • ETC

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LTC1929/LTC1929-PG
2-Phase, High Efficiency,
Synchronous Step-Down
Switching Regulators
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
s
2-Phase Single Output Controller
Reduces Required Input Capacitance and Power
Supply Induced Noise
Current Mode Control Ensures Current Sharing
Phase-Lockable Fixed Frequency: 150kHz to 300kHz
True Remote Sensing Differential Amplifier
OPTI-LOOP
TM
Compensation Improves Transient
Response
鹵
1% Output Voltage Accuracy
Power Good Output Voltage Monitor (LTC1929-PG)
Wide V
IN
Range: 4V to 36V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Internal Current Foldback
Short-Circuit Shutdown Timer with Defeat Option
Overvoltage Soft-Latch Eliminates Nuisance Trips
Available in 28-Lead SSOP Package
The LTC
廬
1929/LTC1929-PG are 2-phase, single output,
synchronous step-down current mode switching regula-
tor controllers that drive N-channel external power MOSFET
stages in a phase-lockable fixed frequency architecture.
The 2-phase controllers drive their two output stages out
of phase at frequencies up to 300kHz to minimize the RMS
ripple currents in both input and output capacitors. The
2-phase technique effectively multiplies the fundamental
frequency by two, improving transient response while
operating each channel at an optimum frequency for
efficiency. Thermal design is also simplified.
An internal differential amplifier provides true remote
sensing of the regulated supply鈥檚 positive and negative
output terminals as required by high current applications.
The RUN/SS pin provides soft-start and a defeatable,
timed, latched short-circuit shutdown to shut down both
channels. Internal foldback current limit provides protec-
tion for the external synchronous MOSFETs in the event of
an output fault. OPTI-LOOP compensation allows the
transient response to be optimized over a wide range of
output capacitance and ESR values.
, LTC and LT are registered trademarks of Linear Technology Corporation.
OPTI-LOOP is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Desktop Computers
Internet/Network Servers
Large Memory Arrays
DC Power Distribution Systems
TYPICAL APPLICATIO
0.1碌F
V
IN
0.1碌F
10鈩?/div>
10碌F
35V
CERAMIC
脳4
0.47碌F
D1
L1
1碌H
0.002鈩?/div>
TG1
BOOST1
LTC1929 SW1
RUN/SS
BG1
PGND
I
TH
SENSE1
+
SENSE1
鈥?/div>
TG2
SGND
BOOST2
SW2
V
DIFFOUT
EAIN
BG2
1000pF
10k
100pF
0.47碌F
D2
10碌F
L2
1碌H
0.002鈩?/div>
16k
+
INTV
CC
SENSE2
+
SENSE2
鈥?/div>
16k
V
OS 鈥?/div>
V
OS +
C
OUT
: T510E108K004AS L1, L2: CEPH149-1ROMC
Figure 1. High Current 2-Phase Step-Down Converter
U
V
IN
5V TO 28V
V
OUT
1.6V/40A
U
U
+
C
OUT
1000碌F
4V
脳2
1929 F01
1

LTC1929IG-PG 產(chǎn)品屬性

  • LTC1929/-PG

  • 47

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 電流模式

  • 1

  • 360kHz

  • 99.5%

  • 4 V ~ 36 V

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • -40°C ~ 85°C

  • 28-SSOP（0.209"，5.30mm 寬）

  • 管件

LTC1929IG-PG相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Dual Micropower Comparator
    LINER
  • 英文版
    DUAL MICROPOWER COMPARATOR
    LINER [Lin...
  • 英文版
    Dual Micropower Comparator
    LINER [Lin...
  • 英文版
    BANG-BANG Controller
    LINER
  • 英文版
    BANG-BANG Controller
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER
  • 英文版
    2-Channel Differential Input 24-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    Dual Precision Intrumentation Switched-Capacitor Building Bl...
    LINER [Lin...
  • 英文版
    Switched Capacitor Voltage Converter
    LINER
  • 英文版
    Switched Capacitor Voltage Converter
    LINER [Lin...
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER [Lin...
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER [Lin...
  • 英文版
    Dual Micropower Chopper Stabilized Operational Amplifier wit...
    LINER
  • 英文版
    Dual Micropower Zero-Drift Operational Amplifier with Intern...
    LINER [Lin...

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