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MAX17536 の電気的特性と機能

MAX17536のメーカーはMaxim Integratedです、この部品の機能は「Step-Down DC-DC Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号
MAX17536
部品説明
Step-Down DC-DC Converter
メーカ
Maxim Integrated
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Maxim Integrated ロゴ 




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MAX17536 Datasheet, MAX17536 PDF,ピン配置, 機能
MAX17536
4.5V to 60V, 4A, High-Efficiency, Synchronous
Step-Down DC-DC Converter
with Internal Compensation
General Description
The MAX17536 high-efficiency, high-voltage, synchronous
step-down DC-DC converter with integrated high-side
MOSFET operates over a 4.5V to 60V input. The
converter can deliver up to 4A and generates output
voltages from 0.9V up to 0.9 x VIN. The feedback (FB)
voltage is accurate to within ±1.4% over -40°C to +125°C.
The MAX17536 uses peak current-mode control. The
device can be operated in the pulse-width modulation
(PWM), pulse-frequency modulation (PFM), and
discontinuous-conduction mode (DCM) control schemes.
The device is available in a 20-pin (5mm x 5mm) thin QFN
(TQFN) package. Simulation models are available.
Applications
● Industrial Power Supplies
● Distributed Supply Regulation
● Base-Station Power Supplies
● Wall Transformer Regulation
● High-Voltage Single-Board Systems
● General-Purpose Point-of-Load
Ordering Information appears at end of data sheet.
Benefits and Features
Reduces External Components and Total Cost
• No Schottky-Synchronous Operation
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input
• Adjustable 0.9V to 0.9 x VIN Output
100kHz to 2.2MHz Adjustable Switching Frequency
with External Synchronization
Reduces Power Dissipation
Peak Efficiency > 95%
PFM/DCM Modes Enables Enhanced Light-Load
Efficiency
Auxiliary Bootstrap LDO for Improved Efficiency
• 3.5FA Shutdown Current
Operates Reliably in Adverse Industrial Environments
Hiccup or Latchoff Mode Overload Protection
DL-to-LX Short Detection Feature
• Built-In Output-Voltage Monitoring with RESET
Programmable EN/UVLO Threshold
Monotonic Startup into Prebiased Load
• Overtemperature Protection
• -40NC to +125NC Operation
Typical Application Circuit for 5V Output
C6
2.2μF
EN/UVLO VIN VIN VIN VIN
RT BST
MODE /SYNC
VCC LX
SGND
CF
RESET
MAX17536
LX
LX
DL
C11
0.1μF
SS
PGND
EXT/VCC
FB
C7
0.022 μF
fSW = 450kHz
VIN
7.5V to 60V
C1
2.2μF
C2
2.2μF
L1
4.7μH
C8
N1 47μF
C9
22μF
L1 = XAL6060-472
N1 = RJK0651DPB
VOUT
5V, 4A
R3
196
R4
43.2
19-7586; Rev 0; 6/15

1 Page





MAX17536 pdf, ピン配列
MAX17536
4.5V to 60V, 4A, High-Efficiency, Synchronous
Step-Down DC-DC Converter
with Internal Compensation
Electrical Characteristics
(VIN = VEN/UVLO = 24V, RRT = open (450kHz), CVCC = 2.2µF, VPGND = VSGND = VMODE/SYNC = 0V, LX = SS = RESET = open,
VBST to VLX = 5V, VFB = 1V, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are
referenced to SGND, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VCC UVLO
EXT LDO
VCC_UVR
VCC_UVF
VCC rising
VCC falling
4.1 4.2 4.3
3.7 3.8 3.9
V
EXT VCC Switchover Voltage
EXT VCC rising
4.56 4.7 4.84 V
EXT VCC Operating Voltage Range
4.84
24 V
EXT VCC Switchover Voltage
Hysteresis
EXT VCC Dropout
EXT VCC-DO
EXT VCC Current Limit
EXT IVCC-MAX
POWER MOSFET AND LOW-SIDE DRIVER
High-Side nMOS On-Resistance
RDS-ONH
LX Leakage Current
ILX_LKG
Pullup Resistance
Pulldown Resistance
SOFT-START (SS)
Charging Current
FEEDBACK (FB)
ISS
FB Regulation Voltage
VFB_REG
FB Input Bias Current
MODE/SYNC
IFB
VEXTVCC = 4.75V, IEXT VCC = 45mA
VCC = 4.3V, EXT VCC = 5V
ILX = 1.0A
VLX = VIN - 1V, VLX = VPGND + 1V,
TA = +25°C
ISOURCE = 100mA
ISINK = 100mA
VSS = 0V
MODE = SGND or MODE = VCC
MODE = open
0 < VFB < 1V, TA = +25°C
MODE Threshold
VM-DCM
VM-PFM
VM-PWM
MODE = VCC (DCM mode)
MODE = open (PFM mode)
MODE = GND (PWM mode)
SYNC Frequency Capture Range
fSW set by RRT
SYNC Pulse Width
SYNC Threshold
CURRENT LIMIT
Peak Current-Limit Threshold
Runaway Current-Limit Threshold
VIH
VIL
IPEAK-LIMIT
RDL = open or RDL = 174kΩ
RDL = 61.9kΩ or RDL = 26.1kΩ
IRUNAWAY-LIMIT RDL = open or RDL = 174kΩ
RDL = 61.9kΩ or RDL = 26.1kΩ
0.205 0.232 0.255
0.4
45 85 140
V
V
mA
45 90
-4 1 +4 µA
1.9 2.9
1 1.65
Ω
Ω
4.7 5 5.3 µA
0.887
0.887
-75
0.9
0.915
0.912
0.936
+75
V
nA
VCC -
0.6
VCC/2
0.6
1.1 x
fSW
50
1.4 x
fSW
2.0
0.8
V
kHz
ns
V
5.45
5
6.25
5.75
6.45
6
7.45
6.85
7.5
7
8.6
7.85
A
A
A
A
www.maximintegrated.com
Maxim Integrated 3


3Pages


MAX17536 電子部品, 半導体
MAX17536
4.5V to 60V, 4A, High-Efficiency, Synchronous
Step-Down DC-DC Converter
with Internal Compensation
Typical Operating Characteristics
(VIN = VEN/UVLO = 24V, VPGND = VSGND = 0V, CVIN = 2 x 2.2µF, CVCC = 2.2µF, CBST = 0.1µF, CSS = 22,000pF, RT = MODE/SYNC = open,
TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless
otherwise noted.)
3.3V OUTPUT, PWM MODE,
LOAD AND LINE REGULATION
FIGURE 4 CIRCUIT
3.55
3.50
3.45
3.40
VIN = 24V
VIN = 48V
3.35
3.30
3.25
3.20 VIN = 12V
3.15
VIN = 36V
3.10
3.05
0
123
LOAD CURRENT (A)
4
5.25
5.2
5.15
5.1
5.05
5
4.95
4.9
4.85
4.8
4.75
0
5V OUTPUT, PFM MODE,
LOAD AND LINE REGULATION
FIGURE 3 CIRCUIT
VIN = 48V
VIN = 12V
VIN = 24V
VIN = 36V
1000 2000 3000
LOAD CURRENT (mA)
4000
3.3V OUTPUT, PFM MODE,
LOAD AND LINE REGULATION
FIGURE 4 CIRCUIT
3.60
3.50 VIN = 48V VIN = 12V
3.40
3.30
3.20
VIN = 36V
3.10
VIN = 24V
3.00
0
1000 2000 3000
LOAD CURRENT (mA)
4000
SWITCHING FREQUENCY vs. RT RESISTANCE
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
0 20 40 60 80 100 120 140 160 180 200
RRT (kΩ)
SOFT-START/SHUTDOWN FROM EN/UVLO,
3.3V OUTPUT, 4A LOAD CURRENT,
FIGURE 4 CIRCUIT
SOFT-START/SHUTDOWN FROM EN/UVLO,
5V OUTPUT, 4A LOAD CURRENT,
FIGURE 3 CIRCUIT
VEN/UVLO
2V/div
VOUT
IOUT
VRESET
2V/div
2A/div
5V/div
2ms/div
SOFT-START/SHUTDOWN FROM EN/UVLO,
5V OUTPUT, PFM MODE, 50mA LOAD CURRENT,
FIGURE 3 CIRCUIT
VEN/UVLO
VOUT
IOUT
VRESET
2ms/div
2V/div
2V/div
2A/div
5V/div
VEN/UVLO
VOUT
VRREESSEETT
5V/div
4ms/div
1V/div
5V/div
www.maximintegrated.com
Maxim Integrated 6

6 Page

合計 : 19 ページ
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[ MAX17536 データシート.PDF ]

データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。

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