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參數資料
| 型號： | DS232AS |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDSO16 |
| 封裝： | 0.300 INCH, SOIC-16 |
| 文件頁數： | 1/28頁 |
| 文件大小： | 581K |
| 代理商： | DS232AS |
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MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
EVALUATION KIT AVAILABLE
19-4219; Rev 2; 3/11
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX15023 dual, synchronous step-down controller
operates from a 5.5V to 28V or 5V ±10% input voltage
range and generates two independent output voltages.
Each output is adjustable from 85% of the input voltage
down to 0.6V and supports loads of 12A or higher. Input
voltage ripple and total RMS input ripple current are
reduced by interleaved 180° out-of-phase operation.
The MAX15023 offers the ability to adjust the switching
frequency from 200kHz to 1MHz with an external resistor.
The MAX15023’s adaptive synchronous rectification elimi-
nates the need for external freewheeling Schottky diodes.
The device also utilizes the external low-side MOSFET’s
on-resistance as a current-sense element, eliminating the
need for a current-sense resistor. This protects the DC-
DC components from damage during output overloaded
conditions or output short-circuit faults without requiring a
current-sense resistor. Hiccup-mode current limit reduces
power dissipation during short-circuit conditions. The
MAX15023 includes two independent power-good out-
puts and two independent enable inputs with precise
turn-on/turn-off thresholds, which can be used for supply
monitoring and for power sequencing.
Additional protection features include cycle-by-cycle,
low-side, sink peak current limit, and thermal shutdown.
Cycle-by-cycle, low-side, sink peak current limit prevents
reverse inductor current from reaching dangerous levels
when the device is sinking current from the output. The
MAX15023 also allows prebiased startup without dis-
charging the output and features adaptive internal digital
soft-start. This new proprietary feature enables monoton-
ic charging of externally large output capacitors at start-
up, and achieves good control of the peak inductor
current during hiccup-mode short-circuit protection.
The MAX15023 is available in a space-saving and ther-
mally enhanced 4mm x 4mm, 24-pin TQFN-EP pack-
age. The device operates over the -40°C to +85°C
extended temperature range.
Applications
Point-of-Load Regulators
Set-Top Boxes
LCD TV Secondary Supplies
Switches/Routers
Power Modules
DSP Power Supplies
Features
o 5.5V to 28V or 5V ±10% Input Supply Range
o 0.6V to (0.85 x VIN) Adjustable Outputs
o Adjustable 200kHz to 1MHz Switching Frequency
o Guaranteed Monotonic Startup into a Prebiased
Load
o Lossless, Cycle-by-Cycle, Low-Side, Source Peak
Current Limit with Adjustable, Temperature-
Compensated Threshold
o Cycle-by-Cycle, Low-Side, Sink Peak Current-
Limit Protection
o Proprietary Adaptive Internal Digital Soft-Start
o ±1% Accurate Voltage Reference
o Internal Boost Diodes
o Adaptive Synchronous Rectification Eliminates
External Freewheeling Schottky Diodes
o Hiccup-Mode Short-Circuit Protection and
Thermal Shutdown
o Power-Good Outputs and Analog Enable Inputs
for Power Sequencing
23
24
22
21
*EP
*EXPOSED PAD (CONNECT TO GROUND).
8
7
9
EN1
PGOOD1
DL1
PGND1
10
FB1
FB2
PGOOD2
DL2
COMP2
PGND2
12
LIM2
45
6
17
18
16
14
13
LIM1
COMP1
DH2
DH1
BST1
LX1
MAX15023
EN2
V
CC
3
15
IN
20
+
11
BST2
SGND
19
12
LX2
RT
TQFN
TOP VIEW
Pin Configuration
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX15023ETG+
-40°C to +85°C
24 TQFN-EP*
MAX15023ETG/V+
-40°C to +85°C
24 TQFN-EP*
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
相關PDF資料 |
PDF描述 |
|---|---|
| DS232A | LINE TRANSCEIVER, PDIP16 |
| DS2404S-001 | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS2404B | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS2404 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS2405P | SPECIALTY MEMORY CIRCUIT, PDSO6 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS232AS/T&R | 制造商:Maxim Integrated Products 功能描述:IC TXRX DUAL RS-232 5V 16-SOIC |
| DS232AS/T&R | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS232AS+ | 功能描述:RS-232接口集成電路 Dual RS-232 Transmitter/Receiver RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS232AS+T&R | 制造商:Maxim Integrated Products 功能描述:IC TXRX DUAL RS-232 5V 16-SOIC |
| DS232AS+T&R | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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