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參數(shù)資料
| 型號： | MIC2199BML |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 300kHz 4mm 】 4mm Synchronous Buck Converter |
| 中文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO12 |
| 封裝： | 4 X 4 MM, MLF-12 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大小： | 222K |
| 代理商： | MIC2199BML |
MIC2199
Ordering Information
Micrel
MIC2199
2
November 2004
Pin Configuration
1
2
3
4
5
6
COMP
EN/UVLO
FB
CSH
VOUT
VIN
HSD
VSW
BST
GND
LSD
VDD
12
11
10
9
8
7
4
×
4 MLF-12L (ML)
Part Number
MIC2199BML
Voltage
Adj
Temperature Range
–40
°
C to +125
°
C
Package
12-lead 4
×
4 MLF
Pin Description
Pin Number
Pin Name
Pin Function
1
COMP
Compensation (Output): Internal error amplifier output. Connect to capacitor
or series RC network to compensate the regulator control loop.
2
EN/UVLO
Enable/Undervoltage Lockout (Input): Low-level signal powers down the
controller. Input below the 2.5V threshold disables switching and functions
as an accurate undervoltage lockout (UVLO). Input below the threshold
forces complete micropower (<0.1
μ
A) shutdown.
3
FB
Feedback (Input): Regulates FB pin to 0.8V. See
“Applications Information”
for resistor divider calculations.
4
CSH
Current-Sense High (Input): Current limit comparator non-inverting input. A
built-in offset of 100mV between CSH and V
OUT
pins in conjunction with the
current-sense resistor set the current limit threshold level. This is also the
non-inverting input to the current sense amplifier.
5
VOUT
Current-Sense Low (Input): Output voltage feedback input and inverting
input for the current limit comparator and the current sense amplifier.
6
VIN
Unregulated Input (Input): +4.5V to +32V supply input.
7
VDD
5V Internal Linear-Regulator (Output): V
DD
is the external MOSFET gate
drive supply voltage and internal supply bus for the IC. Bypass to GND with
4.7
μ
F.
8
LSD
Low-Side Drive (Output): High-current driver output for low-side N-Channel
MOSFET. Voltage swing is between ground and V
DD
.
Ground (Return).
9
GND
10
BST
Boost (Input): Provides drive voltage for the high-side MOSFET driver. The
drive voltage is higher than the input voltage by V
DD
minus a diode drop.
Switch (Return): High-side MOSFET driver return.
11
VSW
12
HSD
High-Side Drive (Output): High-current driver output for high-side MOSFET.
This node voltage swing is between ground and V
IN
+5V minus a diode drop.
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