参数资料
| 型号： | MIC2199BML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 12-MLF |
| 标准包装： | 5,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 85% |
| 电源电压： | 4.5 V ~ 32 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 12-VFDFN 裸露焊盘，12-MLF? |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2199BMLTR MIC2199BMLTR-ND |
Micrel, Inc.
Ordering Information
MIC2199.
Standard
Part Number
Pb-Free
Voltage
Temperature Range
Package
MIC2199BML
MIC2199YML
Adj
?40oC to +125oC
12-Pin 4x4 MLF ?
Pin Configuration
COMP
EN/UVLO
FB
CSH
VOUT
VIN
1
2
3
4
5
6
12
11
10
9
8
7
HSD
VSW
BS T
GND
LSD
VDD
12-Pin 4 × 4 MLF ? (ML)
Pin Description
Pin Number
1
Pin Name
COMP
Pin Function
Compensation (Output): Internal error amplifier output. Connect to capacitor
or series RC network to compensate the regulator control loop.
2
3
4
5
6
7
8
9
10
11
12
EN/UVLO
FB
CSH
VOUT
VIN
VDD
LSD
GND
BST
VSW
HSD
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 (<0.1μA) shutdown.
Feedback (Input): Regulates FB pin to 0.8V. See “Applications Information”
for resistor divider calculations.
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.
Current-Sense Low (Input): Output voltage feedback input and inverting
input for the current limit comparator and the current sense amplifier.
Unregulated Input (Input): +4.5V to +32V supply input.
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
4.7μF.
Low-Side Drive (Output): High-current driver output for low-side N-Channel
MOSFET. Voltage swing is between ground and V DD .
Ground (Return).
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.
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.
January 2010
2
M9999-011310
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