SMB119N View Datasheet(PDF) - Summit Microelectronics
Part Name
Description
MFG CO.
'SMB119N' PDF : 34 Pages View PDF
SMB119
PIN DESCRIPTIONS
Pin
Number
Pin Name
1
DGND
2
PWR_EN
3
DRVL4
4
DRVH4
5
VIN4
6
COMPA4
7
PCHSEQ4
8
COMPB4
9
HEALTHY
10
POWER_FAIL
11
COMP6
12
FB6
13
SW6
14
VIN6
15
DRVL6
16
SYS_EN
17
DRVL7
18
VIN7
19
SW7
20
FB7
21
COMP7
22
nRESET
23
PCHSEQ1
24
VDD_CAP
25
VDDP
Pin Type
Ground
Input
Output
Output
Power
Input
Output
Input
Output
Output
Input
Input
Input/Output
Power
Output
Input
Output
Power
Input/Output
Input
Input
Output
Output
Power
Power
Pin Description
Digital Ground. Connect to isolated PCB ground
Enable input. PWR_EN is programmable to activate one or more
channels. This pin can be programmed to latch and act as a
debounced, manual push button input. Active high when level
triggered, active low when used as a push- button input.
Buck or Boost converter low-side drive. Connect to NFET gate
Buck converter high-side drive. Connect to PFET gate (for buck
only)
Channel 4 controller power. Connect to +2.7V to +6.0V to supply
internal FET drivers
Channel 4 Buck or Boost outputs error amplifier input. Connect this
node to the type three R/C compensation network
Boost converter sequence. Connect to PFET gate for boost channel
on/off and sequencing. Must be tied to ground when unused.
Channel 4 Buck or Boost outputs error amplifier output. Connect
this node to the type three R/C compensation network.
Output Monitor. Open drain active-high output asserts when all
output channels are within UV/OV limits (ignoring disabled outputs)
Battery/Input Monitor. Detects low input voltage. Latched open-drain
active high output. Associated threshold must be set higher than
nBATT_FAULT threshold.
Buck converter 6 compensation pin. Connect to type 2 R/C
compensation network
Buck converter 6 feedback pin. Connect directly to output
Buck converter 6 switch pin. Connect to drains of NFET
Buck Converter 6 Power. Connect to +2.7V to +6.0V to supply
internal PFET
Buck converter 6 low-side drive. Connect to NFET gate
Enable input. The SYS_EN pin is an active high programmable
input used to enable (disable) selected supplies. When unused this
pin should be tied to a solid logic level.
Buck converter 7 low-side drive. Connect to NFET gate
Buck Converter 7 Power. Connect to +2.7V to +6.0V to supply
internal PFET
Buck converter 7 switch pin. Connect to drains of NFET
Buck converter 7 feedback pin. Connect directly to output
Buck converter 7 compensation pin. Connect to type 2 R/C
compensation network
Reset Output. releases with programmable delay after all outputs
are valid. Open-drain active low output
Boost converter 1 sequence. Connect to PFET gate for boost
channel on/off and sequencing. Must be tied to ground when
unused.
VDD Bypass. Connect to VDD bypass capacitor with 10uF
capacitor.
Power Input for the Boost and Buck-Boost Converters. Connect to
+2.7V to +6.0V voltage source
Summit Microelectronics, Inc
4
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