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SMM105NECR00 数据表(PDF) 11 Page - Summit Microelectronics, Inc.

部件名 SMM105NECR00
功能描述  Single-Channel Supply Voltage Marginer and Active DC Output Controller
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制造商  SUMMIT [Summit Microelectronics, Inc.]
网页  http://www.summitmicro.com
标志 SUMMIT - Summit Microelectronics, Inc.

SMM105NECR00 数据表(HTML) 11 Page - Summit Microelectronics, Inc.

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SMM105
Preliminary Information
Summit Microelectronics, Inc
2068 1.8 09/20/05
11
RTRIM(R3) is calculated as follows:
VTRIMlow=0.3V, Regulator VREF=0.8V
The current through R3 is ITRIM=(0.8-0.3)/RTRIM
(ITRIM)(R4) > 15% of VOUT
RTRIMmax should be < the calculated value
C5
0.02uF
R6 10K
C1 1uF
START
R7 10K
R5
20k
C7
0.01uF
For Example:
If Vout=3.3V, R4=63.4K, 15% of Vout=0.5V
ITRIM=8uA, RTRIM=62.5K
Therefore Rtrim standard 1% value down from 62.
J1
1
2
3
4
5
6
7
8
9
10
Gnd
SCL
Gnd3
SDA
Rsrv5
MR
+10V
Rsrv8
+5V
Rsrv10
START
U1
SMM105
1
2
3
4
5
6
8
10
11
12
14
18
19
20
28
SCL
A2
START
A1
READY
A0
WP#
FILT_CAP
FAULT#
COMP2
VM
TRIM_CAP
COMP1
TRIM
SDA
R3
RTRIM
FAULT#
D1
DIODE
READY
VOUT
SMX3200 I2C Programming
Connector 10 pin Header
R1 and R2 need only be
placed once on the I2C bus
C4
0.1uF
R1 10K
R2 10K
R8 10K
C8
0.1uF
U2
Switching Regulator
+Vout
+Vin
VADJ (VREF)
PGOOD
The SMM105 START pin must be inactive during power-up so
that the TRIM pin is high impedence. Once power is nominal,
the START pin can be active to start margin and ADOC
functions
R4
RSET1
+12VIN (+10V to +15V)
Figure 7 – SMM105 Applications schematic for an adjustable switching regulator (Full regulator circuit not
shown).
APPLICATIONS INFORMATION (CONTINUED)


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