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參數(shù)資料
| 型號： | EV2358DS-00A |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 2A, 23V, 370KHz Step-Down Converter |
| 中文描述： | 2A條，為23V，370KHz降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 291K |
| 代理商： | EV2358DS-00A |
MP2358 – 2A, 23V, 370KHz STEP-DOWN CONVERTER
MP2358 Rev. 1.3
3/23/2006
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
ELECTRICAL CHARACTERISTICS
(continued)
V
IN
= 12V, T
A
= +25
°
C, unless otherwise noted.
Parameter
Maximum Duty Cycle
Minimum On Time
EN Shutdown Threshold
Enable Pull Up Current
EN UVLO Threshold Rising
EN UVLO Threshold Hysteresis
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
Symbol Condition
D
MAX
V
FB
= 0.8V
t
ON
I
CC
> 100μA
V
EN
= 0V
V
EN
Rising
V
EN
≤
0.4V
V
EN
≥
3V
Min
0.7
2.37
Typ
90
100
1.0
1.0
2.50
210
23
1.1
160
Max
1.3
2.62
36
1.3
Units
%
ns
V
μA
V
mV
μA
mA
°
C
Note:
4) Slope compensation changes current limit above 40% duty cycle.
PIN FUNCTIONS
QFN10
Pin #
Pin #
1
2
SOIC8
Name Description
NC
No Connect.
BS
Bootstrap. This capacitor (C5) is needed to drive the power switch’s gate above the
supply voltage. It is connected between the SW and BS pins to form a floating supply
across the power switch driver. The voltage across C5 is about 5V and is supplied by
the internal +5V supply when the SW pin voltage is low.
NC
No Connect.
IN
Supply Voltage. The MP2358 operates from a +4.75V to +23V unregulated input. C1
is needed to prevent large voltage spikes from appearing at the input.
SW
Switch. This connects the inductor to either IN through M1 or to GND through M2.
GND Ground. This pin is the voltage reference for the regulated output voltage. For this
reason care must be taken in its layout. This node should be placed outside of the D1
to C1 ground path to prevent switching current spikes from inducing voltage noise
into the part.
FB
Feedback. An external resistor divider from the output to GND, tapped to the FB pin,
sets the output voltage. To prevent current limit runaway during a short circuit fault
condition the frequency foldback comparator lowers the oscillator frequency when the
FB voltage is below 400mV.
COMP Compensation. This node is the output of the transconductance error amplifier and the input
to the current comparator. Frequency compensation is done at this node by connecting a
series R-C to ground. See the compensation section for exact details.
EN
Enable/UVLO. A voltage greater than 2.62V enables operation. Leave EN
unconnected if unused. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from V
IN
to GND. For complete low
current shutdown the EN pin voltage needs to be less than 700mV.
SS
Soft-Start. Connect SS to an external capacitor to program the soft-start. If unused,
leave it open.
1
3
4
2
5
6
3
4
7
5
8
6
9
7
10
8
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| EV2359DJ-00B | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:1.2A, 24V, 1.4MHz Step-Down Converter in a TSOT23-6 |
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| EV2361DQ-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 23V, 1.4MHz Step-Down Converter |
| EV2363DN-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:3A, 27V, 365KHz Step-Down Converter |
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