SMM105 SUMMIT Microelectronics, Inc:, SMM105 Datasheet - Page 10

• Manufacturer Part Number: SMM105
• Description: Single-channel Supply Voltage Marginer And Active Dc Output Controller Microelectronics, Inc.
• Manufacturer: SUMMIT Microelectronics, Inc:

Figure 6 – SMM105 Applications schematic. The accuracy of the external (U4) or internal reference sets the
accuracy of the ADOC function. Total accuracy with a ±0.1% external reference is ±0.2% and ±0.5% with the
internal reference. The 12V supply can go as low as 8V if the internal regulator is set to 3.6V.
Summit Microelectronics, Inc
APPLICATIONS INFORMATION (CONTINUED)
FAULT#
START
READY
+12VIN (+10V to +15V)
VDD (+2.7V to +5.5V)
DIODE
SMX3200 I2C Programming
Connector 10 pin Header
D1
R8
10K
1
3
5
7
9
Gnd
Gnd3
Rsrv5
+10V
+5V
J1
0.01uF
C3
Rsrv10
R9
10K
Rsrv8
SDA
SCL
MR
Vdd
2
4
6
8
10
0.1uF
C2
The SMM105 and the DC-DC Converter
Can Operate with either 12V or VDD
If 12V is used, VDD can be left floating
If VDD is used, 12V can be left floating
C4
0.1uF
11
28
3
5
1
6
4
2
START
READY
FAULT#
SCL
SDA
A0
A1
A2
U1
C7
0.01uF
SMM105
TRIM_CAP
FILT_CAP
C8
0.1uF
COMP1
COMP2
If the SMM105 internal VREF
is used, the VREF_CNTL pin
becomes an output
TRIM
WP#
2068 1.8 09/20/05
VM
C6
0.1uF
Ext VRef
J1
18
20
14
19
12
10
8
0.01uF
C10
C1 1uF
0.02uF
C5
5
1
U4
C9
VOut
Ref
LM4121
VIn
EN
R1
10K
4
3
t
Vdd
Supply
~10K
t
RT2
R2
10K
J2
DC-DC ENABLE
11
7
8
9
+Vin
+Vin
Enable
+Vin
U2
Preliminary Information
DC-DC Converter
Sense
+Vout
+Vout
+Vout
SMM105
Trim
1
2
4
3
10
VOUT
10