STMICROELECTRONICS L5961PD

L5961
MOST power management device (PMD)
Data Brief
Features
■
5V or 3.3V / 650mA DC-DC Converter with
external sync
■
5V or 3.3V/ 40mA standby voltage regulator
■
5V or 3.3V / 60mA switchable voltage regulator
■
Very low quiescent current (zero power mode
and ultra zero power mode feature)
■
Power management fully compatible to MOST
specification
PowerSSO-36
■
Provides power supply for physical layer and
control unit
for the physical layer, the Network Controller and
the External Host Controller of a MOST Node.
■
Switch to power pulse generator
■
Reacts on four different wake-up events
– Switch to power pulse (STPP)
– Light ON (for status)
– Activity on Diagnostic_I/O
– ON/OFF switch
The L5961 also allows the implementation of a
generic MOST node design that can be
reproduced "as is" in any other project, thus
avoiding the activities of redesign and reverification of MOST PMD compliance
■
I2C interface
■
Programmable system configuration
■
Reset generator
■
Intrinsic diagnostic transceiver
(standard LIN2.0)
■
3 battery detectors for battery voltage
monitoring
■
Watchdog circuit
■
PowerSS0-36 and PowerSO-36 packages
options
PowerSO-36
The L5961 implements complete monitoring of
the supply voltage (over-voltage, under-voltage,
critical voltage), moreover it supports multiple
power modes like Zeropower-mode (where one
complete MOST node sinks around 25µA current)
and Ultra-zero power mode (5µA). All the
diagnostic protocols from major carmakers are
supported and the device reacts to many different
wake-up events.
The L5961 is completely configurable through its
I2C bus and fully compatible with MOST
specifications.
L5961 has been specified in cooperation with
SMSC and represents a "chipset" solution when
used with SMSC's MOST network interface
controllers (INIC or NIC).
Description
The L5961 MOST PMD integrates all the discrete
circuitry usually necessary to implement power
supplies and power management for a MOST
node. It includes intrinsic MOST specific power
management together with sophisticated
diagnostic and fail-safe functions. The MOST
PMD is designed to provide direct power supply
January 2008
Table 1.
Rev 1
For further information contact your local STMicroelectronics sales office.
Device summary
Order code
Package
Packing
L5961
PowerSSO-36
Tube
L5961PD
PowerSO-36
Tube
1/7
www.st.com
7
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CSTPPC
RSTPPC
CV1
CV2
Load Dump
Protection
Filtering
ON_SW
DIAG_TXD
DIAG_RXD
DIAG_I/O
STATUS
V1_ADJ
V1
V2
STPPC
GNDSUB
TAB
EHC
RESET
DC-DC
Converter
3.3/5V
650mA
VS2
RSTN
Control
Logic
L5961
I2C - Interface
AD
SCL
Zero p ower mode supplied
Normal mode supplied
VCC
ON-switch
detector
Comparators
Diagnostic
Transceiver
3.3/5V
40mA
Reg1
5V/
60mA
Reg2
STPP
Comparator
VS1
UBatt_F
SDA
RSTPPC = 10kOhm
CSTPPC = 0.1µF
CV1 = CV2 =1µF (ESR<0.1Ohm)
C = 470µF (5mOhm<ESR<50mOhm)
L = 33 µH
CCOMP = 1nF
RCOMP = 0Ohm
Wake-up
Diagnosis
UBatt
GND
Wake-up
Diagnosis
FOR
FOT
GND
UBatt
Internal
5V-power
supply
Watchdog
INIC
PS0
PS1
WDI
V3EN
V3SEL
UZPen
RSTN
V3
SYNC
COMP
PGND
V3_SW
CTRL
RCOMP
L
VCC
VCC
CCOMP
C
AC00261
External
Power Supply
(Option)
Block and application diagram example (with INIC)
L5961
1
Block and application diagram example (with INIC)
Figure 1.
Block and application example (with INIC)
TxD
RxD
PWROFF
INTN
GND
ON-switch
L5961
2
Functionality details
Functionality details
●
●
Provides three basic states:
–
Zero power mode
All external HW is switched off. PM-chip is switched Off except "REG1 voltage
regulator", "Switch-to-power-pulse comparator" and "Control logic".
–
Ultra zero power mode
All external HW is switched off. PM-chip is switched Off except "ON/OFF Control
logic". PMD can be woken up to reach "Zero current mode" by activities on
DIAG_I/O line
–
Normal
PMD and external HW is powered. One of the four possible wake-up conditions
occurs and the wake-up event is confirmed either by means of PWROFF pin or
I2C bus.
To confirm the on-event:
- PWROFF pin must be driven low OR
- the right I2C bus command is provided.
Reacts on four different wake-up events
–
Switch to power pulse (STPP)
–
Light ON (for status)
–
Activity on Diag_I/O
–
ON/OFF switch
●
I2C interface (allowing system programmability)
●
Generation of switch to power pulse (STPP)
●
Online battery monitoring, reacts on battery changes/ events:
–
Over voltage
–
Critical voltage
–
Under voltage
●
Hardware watchdog triggered with discrete input, available to monitor the activity of the
controller
●
Fail-safe behavior:
●
–
Intrinsic filtering time of wake-up events
–
Protection against software caused failures
–
Over-temperature warning / thermal protection
Diagnostic transceiver compatible to standard LIN2.0
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Package information
3
L5961
Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK®
packages. ECOPACK® packages are lead-free. The category of second Level Interconnect
is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner
box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 2.
PowerSSO-36 mechanical data and package dimensions
DIM.
MIN.
2.15
2.15
0
0.18
0.23
10.10
A
A2
a1
b
c
D (1)
mm
TYP.
7.4
E (1)
e
e3
F
G
G1
H
h
k
L
M
N
O
Q
S
T
U
X
Y
MAX.
2.47
2.40
0.075
0.36
0.32
10.50
MIN.
0.084
0.084
0
0.007
0.009
0.398
7.6
0.291
0.5
8.5
2.3
inch
TYP.
MAX.
0.097
0.094
0.003
0.014
0.012
0.413
OUTLINE AND
MECHANICAL DATA
0.299
0.019
0.335
0.090
0.10
0.06
10.50
0.40
10.10
0.004
0.002
0.413
0.016
0.398
5˚
5˚
0.55
0.90
0.022
4.3
0.035
0.169
10˚
10˚
1.2
0.8
2.9
3.65
1.0
0.047
0.031
0.114
0.144
0.039
4.1
6.5
4.7
7.3
0.161
0.256
PowerSSO-36
(exposed pad)
0.185
0.287
A
A2
(1) "D” and “E" do not include mold flash or protrusions Mold flash
or protrusions shall not exceed 0.15 mm per side(0.006”)
hx45
Gauge plane 0.25
c
G
LEAD COPLANARITY
A
D
stand-off
a1
Y
k
e
T
L
E
H
X
O
F
S
Q
U
BOTTOM VIEW
B
0.1 M A B
b
e3
7587131 A
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L5961
Package information
Figure 3.
PowerSO-36 mechanical data and package dimensions
DIM.
mm
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
3.60
0.10
0.30
a2
MAX.
0.1417
0.0039
0.0118
3.30
0.1299
a3
0
0.10
b
0.22
0.38
0.0087
0.0150
c
0.23
0.32
0.0091
0.0126
D
15.80
16.00 0.6220
0.6299
D1
9.40
9.80
0.3701
0.3858
E
13.90
14.5
0.5472
0.5709
E1
10.90
11.10 0.4291
0.4370
2.90
0.1142
E2
E3
5.80
e
0.0039
0.2283
0.65
e3
0
H
15.50
h
0.8
0.2441
0.0256
11.05
G
L
6.20
OUTLINE AND
MECHANICAL DATA
0.4350
0.10
0.0039
15.90 0.6102
0.6260
1.10
0.0433
1.10
0.0315
N
10˚ (max)
s
8˚ (max)
0.0433
PowerSO-36
Note: “D and E1” do not include mold flash or protusions.
- Mold flash or protusions shall not exceed 0.15mm (0.006”)
- Critical dimensions are "a3", "E" and "G".
0096119 C
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Revision history
4
L5961
Revision history
Table 2.
6/7
Document revision history
Date
Revision
21-Jan-2008
1
Changes
Initial release.
L5961
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