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MSK5041-3.3E

Switching Regulator, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44

器件类别：电源/电源管理    电源电路   

厂商名称：M.S. Kennedy Corporation ( Anaren )

厂商官网：https://www.anaren.com/capabilities/multi-chip-modules

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参数 预览 参数对比
器件参数
参数名称
属性值
是否无铅
含铅
是否Rohs认证
不符合
厂商名称
M.S. Kennedy Corporation ( Anaren )
零件包装代码
DFP
包装说明
QFF,
针数
44
Reach Compliance Code
unknown
ECCN代码
EAR99
模拟集成电路 - 其他类型
SWITCHING REGULATOR
控制技术
PULSE WIDTH MODULATION
最大输入电压
30 V
最小输入电压
4.75 V
标称输入电压
5 V
JESD-30 代码
S-PDFP-F44
长度
31.75 mm
功能数量
1
端子数量
44
最高工作温度
125 °C
最低工作温度
-55 °C
最大输出电流
9 A
封装主体材料
PLASTIC/EPOXY
封装代码
QFF
封装形状
SQUARE
封装形式
FLATPACK
峰值回流温度（摄氏度）
NOT SPECIFIED
认证状态
Not Qualified
筛选级别
MIL-PRF-38534
座面最大高度
6.985 mm
表面贴装
YES
切换器配置
BUCK
最大切换频率
330 kHz
温度等级
MILITARY
端子形式
FLAT
端子节距
1.27 mm
端子位置
DUAL
处于峰值回流温度下的最长时间
NOT SPECIFIED
宽度
31.75 mm
Base Number Matches
1
文档预览
ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
FEATURES:
HIGH EFFICIENCY,
8 AMP 1% ACCURATE
SURFACE MOUNT
SWITCHING REGULATORS
5041
SERIES
4707 Dey Road Liverpool, N.Y. 13088
Up To 95% Efficiency For 5V Version
8 Amp Output Current
4.5V to 30V Input Range
Preset 1.9V, 2.5V, 3.3V or 5.0V Output Versions
300KHz Switching Frequency @ 1 Amp and above
User Programmable Soft-Start
Quiescent Current < 2.5mA
User Programmable Current Limit
(315) 701-6751
MIL-PRF-38534 QUALIFIED
DESCRIPTION:
The MSK 5041 series are high efficiency, 8 amp, surface mount switching regulators. The output voltage is
configured for 1.9V, 2.5V, 3.3V or 5.0V internally with a tolerance of 1% at 3 amps. The operating frequency of the
MSK 5041 is 300KHz and is internally set. An external "soft start" capacitor allows the user to control how quickly
the output comes up to regulation voltage after the application of an input. An extremely low quiescent current of
typically less than 2.5mA and nearly 95% operating efficiency keep the total internal power dissipation of the MSK
5041 down to an absolute minimum.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Step-down Switching Regulator
Microprocessor Power Source
High Efficiency Low Voltage
Subsystem Power Supply
1
2
3
4
5
6
7
1
PIN-OUT INFORMATION
Case
Sense High
Sense Low
N/C
RF High
N/C
N/C
34-44
23-33
11-22
10
9
8
Vout
Ground
Vin
Enable
N/C
Cton
PRELIMINARY Rev. - 6/01
ABSOLUTE MAXIMUM RATINGS
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T
C
T
J
ELECTRICAL SPECIFICATIONS
Group A
Subgroup
1,2,3
I
OUT
=3.0A V
IN
=5.0V
I
OUT
=3.0A V
IN
=5.0V
I
OUT
=3.0A V
IN
=5.0V
I
OUT
=3.0A V
IN
=6V
Within SOA
1.0A≤I
OUT
≤8.0A
I
OUT
=3.0A 6V≤V
IN
≤20V
7
Internal I
OUT
≥1.5A
High
Low
V
EN
=V
IN
V
EN
=0V
V
EN
=0V V
IN
=30V
Positive
Negative
Source
Fault Sink
5041-1.9
Efficiency
5041-2.5
5041-3.3
5041-5.0
V
IN
=5.0V I
OUT
=3.0A
V
IN
=5.0V I
OUT
=3.0A
V
IN
=5.0V I
OUT
=3.0A
V
IN
=6V I
OUT
=3.0A
1
2,3
1
2,3
1
2,3
1
2,3
1
-
1,2,3
-
1,2,3
1,2,3
1
1
1
1
1
1
1
1
1
1
1
MSK 5041H SERIES
Min.
4.75
1.88
TBD
2.47
TBD
3.27
TBD
4.95
TBD
8.0
-
-
270
2.0
-
-
-
-
80
-50
2.5
2.0
-
-
-
-
Typ.
-
1.9
1.9
2.5
2.5
3.3
3.3
5.0
5.0
9.0
TBD
0.06
300
-
-
0.5
0.2
2.0
100
-100
4.0
-
70
80
90
95
Max.
30
1.92
TBD
2.53
TBD
3.33
TBD
5.05
TBD
-
-
0.10
330
-
0.5
2.0
2.0
2.5
120
-160
6.5
-
-
-
-
-
MSK 5041 SERIES
Min.
4.75
1.86
-
2.45
-
3.23
-
4.9
-
8.0
-
-
270
2.0
-
-
-
-
75
-45
2.5
2.0
-
-
-
-
Typ.
-
1.9
-
2.5
-
3.3
-
5.0
-
9.0
TBD
0.06
300
-
-
0.5
0.2
2.0
100
-100
4.0
-
70
80
90
95
Max.
30
1.94
-
2.55
-
3.37
-
5.1
-
-
-
0.12
330
-
0.5
2.0
2.0
2.5
125
-165
6.5
-
-
-
-
-
Parameter
Input Supply Range 2
Output Voltage 5041-1.9 8
Output Voltage 5041-2.5 8
Output Voltage 5041-3.3 8
Output Voltage 5041-5.0 8
Output Current
Load Regulation
Line Regulation
Oscillator Frequency 2
Enable Input Voltage 2
Enable Input Current 2
Disabled Quiescent Current 2
Current Limit Threshold 2
Cton Current 2
2
Test Conditions
1
NOTES:
V
IN
=Enable, 5mV≤(sense high-sense low)≤25mV, I
L
=0A, C
OUT
=10x330µF, C
IN
=10x220µF, C
TON
=0.01µF unless otherwise specified.
This parameter is guaranteed by design but need not be tested. Typical parameters are representative of actual device performance but are for reference only.
All output parameters are tested using a low duty cycle pulse to maintain T
J
= T
C
.
Industrial grade and 'E' suffix devices shall be tested to subgroup 1 unless otherwise specified.
Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2 and 3.
Subgroup 1
T
A
=T
C
=+25°C
Subgroup 2
T
A
=T
C
=+125°C
Subgroup 3
T
A
=T
C
=-55°C
7 Actual switching frequency can be load dependent if output current is low. Refer to typical performance curves.
8 Alternate output voltages are available. Please contact the factory.
1
2
3
4
5
6
2
PRELIMINARY Rev. - 6/01
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12°C/W
-40°C to +85°C
-55°C to +125°C
+150°C
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Input Voltage
Enable Voltage
Output Current
Sense Pin Voltage
Thermal Resistance
(Each MOSFET)
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-0.3V, +36V
-0.3V, +36V
9.0 Amps
-0.3V, +7V
T
ST
T
LD
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Case Operating Temperature
MSK5041 Series
MSK5041H/E Series
Junction Temperature
-65°C to +150°C
300°C
Units
V
V
V
V
V
V
V
V
V
A
%
%/V
KHz
V
V
µA
µA
mA
mV
mV
µA
mA
%
%
%
%
APPLICATION NOTES
CURRENT LIMITING:
INPUT CAPACITOR SELECTION:
The MSK 5041 has an internal high frequency ceramic ca-
pacitor (0.1uF) between V
IN
and GND. Connect a low-ESR
bulk capacitor directly to the input pin of the MSK 5041. Se-
lect the bulk input filter capacitor according to input ripple-
current requirements and voltage rating, rather than capacitor
value. Electrolytic capacitors that have low enough ESR to
meet the ripple-current requirement invariably have more than
adequate capacitance values. Aluminum-electrolytic capaci-
tors are preferred over tantalum types, which could cause power-
up surge-current failure when connecting to robust AC adapt-
ers or low-impedance batteries. RMS input ripple current is
determined by the input voltage and load current, with the
worst possible case occuring at V
IN
= 2 x V
OUT
:
I
RMS
= I
LOAD
X
√V
OUT
(V
IN
-V
OUT
)
V
IN
The MSK 5041 is equipped with a pair of sense pins that
are used to sense the load current using an external resistor
(Rs). The current-limit circuit resets the main PWM latch and
turns off the internal high-side MOSFET switch whenever the
voltage difference between Sense High and Sense Low ex-
ceeds 100mV. This limiting occurs in both current flow direc-
tions, putting the threshold limit at ±100mV. The tolerance
on the positive current limit is ±20%. The external low-value
sense resistor must be sized for 80mV/Rs to guarantee enough
load capacity. Load components must be designed to with-
stand continuous current stresses of 120mV/Rs.
For very high-current applications, it may be useful to wire
the sense inputs with a twisted pair instead of PCB traces.
This twisted pair needn't be anything unique, perhaps two pieces
of wire-wrap wire twisted together. Low inductance current
sense resistors, such as metal film surface mount styles are
best.
SOFT START/Cton:
OUTPUT CAPACITOR SELECTION:
The output capacitor values are generally determined by
the ESR and voltage rating requirements rather than capaci-
tance requirements for stability. Low ESR capacitors that meet
the ESR requirement usually have more output capacitance than
required for stability. Only specialized low-ESR capacitors in-
tended for switching-regulator applications, such as AVX TPS,
Sprague 595D, Sanyo OS-CON, Nichicon PL series or Kemet
T510 series should be used. The capacitor must meet mini-
mum capacitance and maximum ESR values as given in the
following equations:
C
F
> 2.5V(1 + V
OUT
/V
IN(MIN)
)
V
OUT
x R
SENSE
x f
R
ESR
< R
SENSE
x V
OUT
2.5V
These equations provide 45 degrees of phase margin to
ensure jitter-free fixed-frequency operation and provide a damped
output response for zero to full-load step charges. Lower qual-
ity capacitors can be used if the load lacks large step charges.
Bench testing over temperature is recommended to verify ac-
ceptable noise and transient response. As phase margin is
reduced, the first symptom is timing jitter, which shows up in
the switching waveforms. Technically speaking, this typically
harmless jitter is unstable operation, since the swithcing fre-
quency is non-constant. As the capacitor ESR is increased,
the jitter becomes worse. Eventually, the load-transient wave-
form has enough ringing on it that the peak noise levels exceed
the output voltage tolerance. With zero phase margin and in-
stability present, the output voltage noise never gets much
worse than I
PEAK
x R
ESR
(under constant loads). Designers of
industrial temperature range digital systems can usually multi-
ply the calculated ESR value by a factor of 1.5 without hurting
stability or transient response.
The output ripple is usually dominated by the ESR of the
filter capacitors and can be approximated as I
RIPPLE
x R
ESR
.
Including the capacitive term, the full equation for ripple in the
continuous mode is V
NOISE(p-p)
=I
RIPPLE
x (R
ESR
+ 1/(2πfC)). In
idle mode, the inductor current becomes discontinuous with
high peaks and widely spaced pulses, so the noise can actually
be higher at light load compared to full load. In idle mode, the
output ripple can be calculated as follows:
V
NOISE(p-p)
= 0.02 x R
ESR
+ 0.0003 x 2.35µH x [1/V
OUT
+ 1/(V
IN
-V
OUT
)]
R
SENSE
(R
SENSE
)² x C
The internal soft-start circuitry allows a gradual increase of
the internal current-limit level at start-up for the purpose of
reducing input surge currents, and possibly for power-supply
sequencing. In Disable mode, the soft-start circuit holds the
Cton capacitor discharged to ground. When Enable goes high,
a 4µA current source charges the Cton capacitor up to 3.2V.
The resulting linear ramp causes the internal current-limit thresh-
old to increase proportionally from 20mV to 100mV. The out-
put capacitors charge up relatively slowly, depending on the
Cton capacitor value. The exact time of the output rise de-
pends on output capacitance and load current and is typically
1mS per nanofarad of soft-start capacitance. With no capaci-
tor connected, maximum current limit is reached typically within
10µS.
The MSK 5041 is enabled by applying a logic level high to
the Enable pin. A logic level low will disable the device and
quiescent input current will reduce to approximately 2mA. The
Enable threshold voltage is 1V. If automatic start up is re-
quired, simply connect the pin to V
IN
. Maximum Enable volt-
age is +36V.
ENABLE FUNCTION:
POWER DISSIPATION:
In high current applications, it is very important to ensure
that both MOSFETS are within their maximum junction tem-
perature at high ambient temperatures. Temperature rise can
be calculated based on package thermal resistance and worst
case dissipation for each MOSFET. These worst case dissipa-
tions occur at minimum voltage for the high side MOSFET and
at maximum voltage for the low side MOSFET.
Calculate power dissipation using the following formulas:
Pd (upper FET)=I
LOAD
² x 0.022Ω x DUTY
+ V
IN
x I
LOAD
x f x V
IN
x C
RSS
+20ns
I
GATE
Pd (lower FET)=I
LOAD
² x 0.022Ω x (1-DUTY)
DUTY= (V
OUT
+V
Q2
)
(V
IN
-V
Q1
)
Where: V
Q1
or V
Q2
(on state voltage drop)=I
LOAD
x 0.022Ω
C
RSS
=94pF
I
GATE
=1A
During output short circuit, Q2, the synchronous-rectifier
MOSFET, will have an increased duty factor and will see addi-
tional stress. This can be calculated by:
Q2 DUTY=1-
V
Q2
V
IN(MAX)
-V
Q1
Where: V
Q1
or V
Q2
=(120
MV
/R
SENSE
)x0.022
3
PRELIMINARY Rev. - 6/01
APPLICATION NOTES CONT'D
RF HIGH:
It is very important that the DC voltage returned to the RF high pin from the output be as noise and oscillation free as possible.
This voltage helps to determine the final output and therefore must be a clean voltage. Excessive noise or oscillation can cause the
device to have an incorrect output voltage. Proper PC board layout techniques can help to achieve a noise free voltage at the RF
high pin.
MODES OF OPERATION:
Under heavy loads, the MSK 5041 operates in full PWM mode. Each pulse from the oscillator sets the internal PWM latch that
turns on the high-side MOSFET. As the high-side switch turns off, the synchronous rectifier latch is set. 60ns later the low-side
MOSFET turns on until the start of the next clock cycle or until the inductor current crosses zero. Under fault conditions the current
exceeds the ±100mV current-limit threshold and the high-side switch turns off.
At light loads the inductor current does not exceed the 30mV threshold set by the minimum-current comparator. When this
occurs, the MSK 5041 goes into idle mode, skipping most of the oscillator pulses in order to reduce the switching frequency and
cut back gate-charge losses. The oscillator is gated off at light loads because the minimum-current comparator immediately resets
the high-side latch at the start of each cycle. Refer to Table 1 for the operational characteristics.
OPERATIONAL CHARACTERISTICS
ENABLE
0
1
1
1
LOAD
X
LOW <10%
MED <30%
HIGH >30%
DESCRIPTION
DEVICE DISABLED
PULSE SKIPPING MODE DISCONTINUOUS INDUCTOR CURRENT
PULSE SKIPPING MODE CONTINUOUS INDUCTOR CURRENT
CONSTANT FREQ. PWM MODE CONTINUOUS INDUCTOR CURRENT
TABLE 1
TYPICAL 2.5V APPLICATION CIRCUIT
4
PRELIMINARY Rev. - 6/01
TYPICAL PERFORMANCE CURVES
PERFORMANCE CURVES ARE CURRENTLY UNDER DEVELOPMENT
5
PRELIMINARY Rev. - 6/01
查看更多>
参数对比
与MSK5041-3.3E相近的元器件有：MSK5041-1.9、MSK5041-3.3H、MSK5041-3.3、MSK5041-2.5。描述及对比如下：
型号 MSK5041-3.3E MSK5041-1.9 MSK5041-3.3H MSK5041-3.3 MSK5041-2.5
描述 Switching Regulator, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44 Switching Regulator, Voltage-mode, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44 Switching Regulator, Voltage-mode, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44 Switching Regulator, Voltage-mode, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44 Switching Regulator, Voltage-mode, 9A, 330kHz Switching Freq-Max, PDFP44, DFP-44
是否无铅 含铅 含铅 含铅 含铅 含铅
是否Rohs认证 不符合 不符合 不符合 不符合 不符合
零件包装代码 DFP DFP DFP DFP DFP
包装说明 QFF, QFF, FL44,1.2 QFF, FL44,1.2 QFF, FL44,1.2 QFF, FL44,1.2
针数 44 44 44 44 44
Reach Compliance Code unknown unknown unknown unknown unknown
ECCN代码 EAR99 EAR99 EAR99 EAR99 EAR99
模拟集成电路 - 其他类型 SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
控制技术 PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
最大输入电压 30 V 30 V 30 V 30 V 30 V
最小输入电压 4.75 V 4.75 V 4.75 V 4.75 V 4.75 V
标称输入电压 5 V 5 V 5 V 5 V 5 V
JESD-30 代码 S-PDFP-F44 S-PDFP-F44 S-PDFP-F44 S-PDFP-F44 S-PDFP-F44
长度 31.75 mm 31.75 mm 31.75 mm 31.75 mm 31.75 mm
功能数量 1 1 1 1 1
端子数量 44 44 44 44 44
最高工作温度 125 °C 85 °C 125 °C 85 °C 85 °C
最低工作温度 -55 °C -40 °C -55 °C -40 °C -40 °C
最大输出电流 9 A 9 A 9 A 9 A 9 A
封装主体材料 PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
封装代码 QFF QFF QFF QFF QFF
封装形状 SQUARE SQUARE SQUARE SQUARE SQUARE
封装形式 FLATPACK FLATPACK FLATPACK FLATPACK FLATPACK
峰值回流温度（摄氏度） NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
认证状态 Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
筛选级别 MIL-PRF-38534 MIL-PRF-38534 MIL-PRF-38534 Class H MIL-PRF-38534 MIL-PRF-38534
座面最大高度 6.985 mm 6.985 mm 6.985 mm 6.985 mm 6.985 mm
表面贴装 YES YES YES YES YES
切换器配置 BUCK BUCK BUCK BUCK BUCK
最大切换频率 330 kHz 330 kHz 330 kHz 330 kHz 330 kHz
温度等级 MILITARY INDUSTRIAL MILITARY INDUSTRIAL INDUSTRIAL
端子形式 FLAT FLAT FLAT FLAT FLAT
端子节距 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm
端子位置 DUAL DUAL DUAL DUAL DUAL
处于峰值回流温度下的最长时间 NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
宽度 31.75 mm 31.75 mm 31.75 mm 31.75 mm 31.75 mm
Base Number Matches 1 1 1 1 1
厂商名称 M.S. Kennedy Corporation ( Anaren ) M.S. Kennedy Corporation ( Anaren ) M.S. Kennedy Corporation ( Anaren ) M.S. Kennedy Corporation ( Anaren ) -
控制模式 - VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
封装等效代码 - FL44,1.2 FL44,1.2 FL44,1.2 FL44,1.2
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