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STM1068
Smart voltage supervisor
Features

Operating voltage 2.7 V to 5.5 V Supply current of 1.5 A (typ) Factory-trimmed voltage threshold from 3.2 V to 3.5 V in 50 mV increments 3% voltage threshold accuracy across temperature Enable and inhibit inputs (EN, INH) Power supply transient immunity Current limited output of 15 mA (max) Available in flip chip 8-bump package Operating temperature -30C to +85C
Flip chip (8-bump)
Applications

Portable devices Cell phones/smart phones PDA Palmtops Organizers Portable audio/video players Portable terminals
May 2008
Rev 6
1/22
www.st.com 1
Contents
STM1068
Contents
1 2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 2.2 2.3 2.4 Output, OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Enable input, EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Inhibit input, INH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Pass gate, PKX and POX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 4 5 6 7 8 9
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Package marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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STM1068
List of tables
List of tables
Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Truth table for output, OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Truth table for pass gate between PKX and POX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Flip chip 8-bump, package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Factory-trimmed thresholds with marking description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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List of figures
STM1068
List of figures
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8-bump flip chip connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Supply current vs. supply voltage, VEN = 4 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Supply current vs. temperature, VEN = 4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Supply current vs. supply voltage, VEN = 0 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Supply current vs. temperature, VEN = 0 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Rising voltage detector threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Threshold hysteresis vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Flip chip 8-bump, package mechanical outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Flip chip tape and reel specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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STM1068
Description
1
Description
STM1068 device monitors supply voltage VCC and the state of EN and INH inputs. Depending on logical combination of these inputs, the output OUT is connected to VIN or GND and the pass gate between PKX and POX is either enabled or disabled (see Table 2 and Table 3 for more details). The device offers several voltage thresholds, VTH+ (see Table 9) and it is available in miniature flip chip 8-bump package. Figure 1. Logic diagram
VCC VIN
EN OUT INH PKX STM1068 POX
GND
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Description
STM1068
Table 1.
Pin descriptions
Pin 1A 1B 1C 1D 2A 2B 2C 2D Symbol VIN EN GND PKX OUT INH VCC POX Function Supply for output pin (OUT) Enable from USB VBUS Ground Pass gate input Output Inhibit input Supply voltage Pass gate output
Figure 2.
8-bump flip chip connections
A 1
VIN
B
EN
C
GND
D
PKX
A 2
OUT
B
IN H
C
VCC
D
POX
2
OUT
IN H
VCC
POX
1
VIN
EN
GND
PKX
bottom view, bumps up
top view, bumps down
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STM1068 Figure 3. Block diagram
VIN VCC
Description
Current source GND
Bandgap
+ -
Level shifter LOGIC EN Delay 2s VCC
OUT
POX 8kV ESD Protection
INH
PKX
ai13960
Figure 4.
Hardware hookup
USB charging and transceiver circuits VBAT DC-DC step-up converter VCC EN OUT GND
VBUS USB connector R1
R2
C3
VBOOST
VBAT C1 EN Inhibit control VCC VIN
ASIC
VOUT STM1068 POX INH GND PKX C2
Power key
VCHARGER Power key
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Operation
STM1068
2
Operation
The STM1068 device monitors supply voltage VCC and logic states of EN and INH inputs. According to detected states is the output OUT connected to VIN or GND and the pass gate between PKX and POX is either enabled or disabled (see Table 2, Table 3 , and Figure 11 for more details).
2.1
Output, OUT
If the enable input is in a logic high state and inhibit input is in a logic low state, the output will be connected to VIN input as VCC rises above the VTH+ voltage threshold. Otherwise, the output is connected to ground GND. The output is current limited (see Table 6).
2.2
Enable input, EN
A logic low on the enable input disconnects the output, OUT, from VIN, the POX will follow the PKX and the device enters a standby mode with very low current consumption (see Table 6).
2.3
Inhibit input, INH
A logic high on the inhibit input disconnects the output, OUT, from VIN and the POX will follow the PKX.
2.4
Pass gate, PKX and POX
Pass gate between PKX and POX is disabled only if enable input is in logic high, inhibit input is in logic low and the supply voltage is below the voltage threshold. Table 2.
EN(1) L x x H
Truth table for output, OUT
INH x H x L VCC x x VTH+ (rising edge) >VTH- (falling edge) OUT connected to GND connected to GND connected to GND connected to VIN
1. Once the device is disabled by EN input, the VCC must be above VTH+ to reconnect output to VIN.
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STM1068
Operation
Table 3.
Truth table for pass gate between PKX and POX
EN L x x H INH x H x L VCC x x >VTH+ (rising edge) >VTH- (falling edge) Note:
Table valid for VCC > 2.7 V.
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Typical operating characteristics
STM1068
3
Typical operating characteristics
Figure 5.
3.0 2.5
Supply current vs. supply voltage, VEN = 4 V
Supply Current, ICC (A)
2.0 1.5 1.0 0.5 0.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
TA = -30 C TA = 25 C TA = 0C TA = 85C
Supply Voltage, VCC (V)
ai13942
Figure 6.
Supply current vs. temperature, VEN = 4 V
2.5
Supply Current, ICC (A)
2.0
1.5
1.0 VCC = 2.70 V 0.5
VCC = 3.50 V VCC = 4.25 V VCC = 5.00 V VCC = 5.50 V
-30 -20 -10 0 10 20 30 40 50 60 70 80
0.0
Temperature, TA (C)
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STM1068 Figure 7.
0.8 0.7
Typical operating characteristics Supply current vs. supply voltage, VEN = 0 V
Supply Current, ICC (A)
0.6 0.5 0.4 0.3 0.2 0.1 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
TA = -30 C TA = 85 C TA = 25 C TA = 0 C
Supply Voltage, VCC (V)
ai13944
Figure 8.
0.65
Supply current vs. temperature, VEN = 0 V
Supply Current, ICC (A)
0.60
0.55
VCC = 2.70 V VCC = 3.50 V
0.50
VCC = 4.25 V VCC = 5.00 V VCC = 5.50 V
0.45 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature, TA (C)
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Typical operating characteristics Figure 9.
Rising voltage detector threshold, VTH+ (V)
STM1068
Rising voltage detector threshold vs. temperature
3.50
maximum value
3.45 3.40 3.35 3.30
typical value
minimum value
3.25 3.20 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature, TA (C)
ai13946
Figure 10. Threshold hysteresis vs. temperature
550
Threshold Hysteresis, VHYST (mV)
maximum value
500 450 400 350
minimum value
300 250 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature, TA (C)
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STM1068
Maximum ratings
4
Maximum ratings
Stressing the device above the rating listed in the "Absolute maximum ratings" table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents.
Table 4.
Symbol VCC VIN VEN VOUT VINH
Absolute maximum ratings
Parameter Supply voltage Output source voltage VBUS input Output pin Inhibit pin Min -0.2 -0.2 -0.2 -0.3 -0.3 -2 Typ Max +7.0 +7.0 VCC + 0.3 VIN + 0.3 VCC + 0.3 +2 +8 +500 +100 +8 +15 +85 +150 Unit V V V V V kV kV V V kV kV C C Human body model (all pins) Human body model (PKX only) Charged device model Machine model IEC61000-4-2 IEC61000-4-2 Independent of VCC Series 1M external resistor for protection Remarks
VESD
Electrostatic protection -8
VESD VESD VESD VESD TA
Electrostatic protection Electrostatic protection Point discharge on PKX key Air discharge on PKX key Operating ambient temperature Storage temperature
-500 -100 -8 -15 -30 -45
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DC and AC characteristics
STM1068
5
DC and AC characteristics
This section summarizes the operating measurement conditions and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics tables that follow are derived from tests performed under the measurement conditions summarized in Table 5: Operating and AC measurement conditions. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. Table 5. Operating and AC measurement conditions
Parameter VCC supply voltage Ambient operating temperature (TA) Input rise and fall times Condition 2.7 to 5.5 -30 to 85 5 Unit V C ns
Figure 11. Waveforms
VCC (VBAT) VTH+ VTH~2.1V
~2.3V EN (VBUS) VEN-IL
VEN-IH
INH
VIN
OUT
OUT follows VIN OUT follows VIN OUT follows VIN
POX POX follows PKX
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Note:
VIN assumed to be from 1.65 V to 5.5 V. No VIN means no signal on OUT pin. If there is no VCC then there will be no VIN.
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STM1068 Table 6.
Sym
DC and AC characteristics DC and AC characteristics
Parameter Test condition(1) Min Typ Max Unit
VCC ICC
Supply voltage Supply current into VCC pin VEN = 0 V VEN = 4 V VEN = 0 V VEN = 4 V
2.7 0.6 1.5
5.5 1 15 5 15
V A A A A V V V
ICC +IIN VTH+ VHYST VTH-
Current into VCC + VIN pins Rising voltage detector threshold (see Table 8 on page 19 for detailed listing) Threshold hysteresis Falling voltage detector threshold
-3% 0.3
VTH+
+3% 0.5
VTH+ - VHYST VCC falling from (VTH- + 100 mV) to (VTH- - 100 mV) at 10 mV/s VCC rising from (VTH+ - 100 mV) to (VTH+ + 100 mV) at 10 mV/s Allows 2.5 V rail, VBAT or +5 V 2.4
tPD-FALL(2) VCC falling to OUT delay
30
s
tPD-RISE(2) VCC rising to OUT delay
70
s
VIN
Voltage on VIN pin Supply for output pin
5.5
V
Output pin, OUT(3) VOUT-OH VOUT-OL IOUT Output high voltage Output low voltage Output current ISOURCE = 5 mA ISINK = 10 mA 5 VIN - 0.2 VIN 0.3 15 V V mA
Enable input, EN VEN-IH VEN-IL IEN-IN When VBUS is valid When VBUS is not valid Enable input current EN glitch immunity Inhibit input, INH VINH-IH VINH-IL VINH-IN Inhibit logic high Inhibit logic low Inhibit input current INH glitch immunity 1 1.2 0.4 0.1 V V A s 1 1.2 0.4 0.1 V V A s
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DC and AC characteristics Table 6.
Sym
STM1068
DC and AC characteristics (continued)
Parameter Test condition(1) Min Typ Max Unit
Pass gate between PKX and POX RDS(on) Static pass gate on resistance 300
1. Valid for ambient operating temperature: TA = -30C to +85C; VCC = 2.7 V to 5.5 V (except where noted). 2. Guaranteed by design. 3. For VCC below VTH-, the output remains low down to VCC = 1 V. Below VCC = 1 V the voltage VIN must be less than VOUT-OL (max.) to guarantee output low voltage less than 0.3 V.
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STM1068
Package mechanical data
6
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. 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 12. Flip chip 8-bump, package mechanical outline
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Package mechanical data
STM1068
Table 7.
Symbol
Flip chip 8-bump, package mechanical data
mm Min Typ 0.60 0.205 0.395 0.215 1.570 0.255 1.600 1.20 0.36 0.77 0.36 0.18 0.40 0.80 0.40 0.20 0.20 0.05 0.035 0.045 0.050 0.001 0.44 0.83 0.44 0.22 0.014 0.030 0.014 0.007 0.295 1.605 0.008 0.062 Max 0.66 0.240 Min 0.021 0.007 inches Typ 0.024 0.008 0.015 0.010 0.063 0.047 0.016 0.031 0.016 0.008 0.008 0.002 0.002 0.002 0.017 0.033 0.017 0.009 0.012 0.063 Max 0.026 0.009
A A1 A2 b D D1 e E E1 SE f ccc $
0.54 0.170
Figure 13. Flip chip tape and reel specifications
Dot identifying pin A1 location
.05
4.000.10 2000.05 1.750.10 3.500.05
0.2000.015
1.5
50
0.710.05
TxS yww
TxS yww
TxS yww
TxS yww
TxS yww
0.92 0.05
4.000.10
All dimensions in mm
User direction of unreeling
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-0.10 8.00 +0.30
1.66 0.05
STM1068
Part numbering
7
Part numbering
Table 8.
Example:
Ordering information scheme
STM1068 C35 F3 8 F
Device type STM1068
Threshold voltage (3.2V to 3.5V in 0.05V increments) C20: 3.20V(1) C25: 3.25V(1) C30: 3.30V(1) C35: 3.35V C40: 3.40V(1) C45: 3.45V(1) C50: 3.50V(1)
Package F3: Flip chip, lead-free, pitch = 400m, bump = 250m, 8-bump
Temperature range 8: -30C to 85C
Shipping method F = ECOPACK(R) package, tape & reel
1.
Contact local ST sales office for availability.
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Package marking information
STM1068
8
Table 9.
Package marking information
Factory-trimmed thresholds with marking description
Rising voltage detector threshold VTH+ at ambient temperature TA from -30 to +85C Min (-3%) Typ 3.20 3.25 3.30 3.35 3.40 3.45 3.50 Max (+3%) 3.296 3.348 3.399 3.451 3.502 3.554 3.605 THS yww TIS yww TJS yww TKS yww TLS yww TMS yww TNS yww Topside marking(1)
Part number
STM1068C20F38F STM1068C25F38F STM1068C30F38F STM1068C35F38F STM1068C40F38F STM1068C45F38F STM1068C50F38F
3.104 3.152 3.201 3.249 3.298 3.346 3.395
1. Where "y" = assembly year (0 to 9) and "ww" = assembly work week (01 to 52).
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STM1068
Revision history
9
Revision history
Table 10.
Date 31-Aug-2007 07-Sep-2007 03-Jan-2008 26-Mar-2008 09-Apr-2008 27-May-2008
Document revision history
Revision 1 2 3 4 5 6 Initial release. Updated cover page, Section 1: Description, Figure 3, and Table 6. Updated Figure 1, 11, 13, and Table 3, 5, 6, 9; added Section 3: Typical operating characteristics; minor presentation changes. Updated Table 6, 7. Document status upgraded to full datasheet; updated Figure 12. Minor document reformatting. Changes
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STM1068
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