参数资料
型号: MIC2155YML TR
厂商: Micrel Inc
文件页数: 5/35页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 32MLF
特色产品: MIC2155/6 Buck Control IC
标准包装: 1
PWM 型: 电压模式
输出数: 1
频率 - 最大: 550kHz
占空比: 80%
电源电压: 4.5 V ~ 14.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 32-VFQFN 裸露焊盘,32-MLF?
包装: 标准包装
产品目录页面: 1091 (CN2011-ZH PDF)
其它名称: 576-3527-6
Micrel, Inc.
Pin Description cont.
MIC2155/2156
Pin Number
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
EPAD
Pin Name
PGOOD
EA2+
FB2
COMP2
VOUT
VIN2
N/C
SW2
HSD2
BST2
PGND2
LSD2
VDD
EN1
VIN1
LSD1
PGND1
EP
Pin Function
Power Good (Output): Asserts high when voltage on the FB pin rises above
Power Good threshold.
(input) Positive input to Channel 2 (current sharing) Error Amplifier. Connect to
Channel 1 current sense.
Negative Input to Channel 2 (current sharing) Error Amplifier (Input). Connect to
Channel 2 current sense.
Compensation 2 (Input): Pin for external compensation of Channel 2.
Output Sense (input): Connect to output side of inductors. Used for current
sharing.
Supply Voltage for Channel 2 (Input). Used for Channel 2 UVLO circuit.
No Connect
Switch node 2 (Output): Return for HSD2.
High-Side Drive 2 (Output): High-current output-driver for the high-side
MOSFET.
Boost 2 (Input): Provides voltage for high-side MOSFET driver in Channel 2. The
gate drive voltage is higher than the source voltage by V DD minus a diode drop.
Power Ground 2. High current return for low-side driver 2.
Low-Side Drive 2 (Output): High-current driver output for Channel 2 low-side
external MOSFET.
5V Internal Linear Regulator from V IN 1 (Output): V DD is the ext. MOSFET gate
drive supply voltage and an internal supply bus for the IC. When V IN 1 is <5V, this
regulator operates in drop-out mode. Connect external bypass capacitor.
Enable 1 (Input): Output enable. Turns off both sides. Pull high to enable. Pull
low to disable.
Supply voltage Channel 1 (Input): Used for UVLO and V DD circuits.
Low-Side Drive 1 (Output): High-current driver output for Channel 1 low-side
external MOSFET.
Power Ground 1. High current return for low-side driver 1.
Exposed Pad (Power): Must make a full connection to the GND plane to
maximize thermal performance of the package.
November 2009
5
M9999-111209-B
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