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PDF STM6600 Data sheet ( Hoja de datos )
| Número de pieza | STM6600 | |
| Descripción | Smart push-button on/off controller | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STM6600
STM6601
Smart push-button on/off controller with
Smart ResetTM and power-on lockout
Features
■ Operating voltage 1.6 V to 5.5 V
■ Low standby current of 1 µA
■ Adjustable Smart Reset™ assertion delay time
driven by external CSRD
■ Power-up duration determined primarily by
push-button press (STM6600) or by fixed time
period, tON_BLANK (STM6601)
■ Debounced PB and SR inputs
■ PB and SR ESD inputs withstand voltage up to
±15 kV (air discharge) ±8 kV (contact
discharge)
■ Active high or active low enable output option
(EN or EN) provides control of MOSFET,
DC-DC converter, regulator, etc.
■ Secure startup, interrupt, Smart Reset™ or
power down driven by push-button
■ Precise 1.5 V voltage reference with 1%
accuracy
■ Industrial operating temperature –40 to +85 °C
■ Available in TDFN12 2 x 3 mm package
TDFN12
Applications
■ Portable devices
■ Terminals
■ Audio and video players
■ Cell phones and smart phones
■ PDAs, palmtops, organizers
Table 1. Device summary
Device
RST
CSRD PB / SR EN or EN
INT
Startup process
STM6600 open drain(1) ✓
✓
push-pull
open drain(1)
PB must be held low until the
PSHOLD(2) confirmation
STM6601 open drain(1) ✓
✓
push-pull
open drain(1)
PB can be released before the
PSHOLD(2) confirmation
1. External pull-up resistor needs to be connected to open drain outputs.
2. For a successful startup, the PSHOLD (Power Supply Hold) needs to be pulled high within specific time, tON_BLANK.
June 2010
Doc ID 15453 Rev 7
1/51
www.st.com
1
1 page  
STM6600 - STM6601
1 Description
Description
The STM6600-01 devices monitor the state of connected push-button(s) as well as sufficient
supply voltage. An enable output controls power for the application through the MOSFET
transistor, DC-DC converter, regulator, etc. If the supply voltage is above a precise voltage
threshold, the enable output can be asserted by a simple press of the button. Factory-
selectable supply voltage thresholds are determined by highly accurate and temperature-
compensated references. An interrupt is asserted by pressing the push-button during
normal operation and can be used to request a system power-down. The interrupt is also
asserted if undervoltage is detected. By a long push of one button (PB) or two buttons (PB
and SR) either a reset is asserted or power for the application is disabled depending on the
option used.
The device also offers additional features such as precise 1.5 V voltage reference with very
tight accuracy of 1%, separate output indicating undervoltage detection and separate output
for distinguishing between interrupt by push-button or undervoltage.
The device consumes very low current of 6 µA during normal operation and only 1 µA
current during standby.
The STM6600-01 is available in the TDFN12 package and is offered in several options
among features such as selectable threshold, hysteresis, timeouts, output types, etc. (see
Table 8 and Table 9 for more information).
Figure 1. Application hookup
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1. A resistor is required for open drain output type only. A 10 kΩ pull-up is sufficient in most applications.
2. Capacitor CREF is mandatory on VREF output (even if VREF is not used). Capacitor value of 1 µF is recommended.
3. For the STM6601 the processor has to confirm the proper power-on during the fixed time period, tON_BLANK. This failsafe
feature prevents the user from turning on the system when there is a faulty power switch or an unresponsive
microprocessor.
Doc ID 15453 Rev 7
5/51
5 Page 
STM6600 - STM6601
Pin descriptions
EN or EN - enable output
This output is intended to enable system power (see Figure 1). EN is asserted high after
a valid turn-on event has been detected and confirmed (i.e. push-button has been pressed
and held for tDEBOUNCE or more and VCC > VTH+ voltage level has been detected - see
Figure 13). EN is released low if any of the conditions below occur:
a) the push-button is released before PSHOLD is driven high (valid for STM6600, see
Figure 9) or tON_BLANK expires before PSHOLD is driven high during startup (valid
for both STM6600 and STM6601, see Figure 10 and 12).
b) PSHOLD is driven low during normal operation (see Figure 14).
c) an undervoltage condition is detected for more than tSRD + tINT_Min + tDEBOUNCE
(see Figure 21).
d) a long push of the buttons is detected (only for the device with option “EN
deasserted by long push” - see Figure 19) or PSHOLD is not driven high during
tON_BLANK after a long push of the buttons (only for the device with option “RST
asserted by long push” - see Figure 18).
Described logic levels are inverted in case of EN output. Output type is push-pull by default.
RST - reset output
This output pulls low for tREC:
a) during startup. PB has been pressed (falling edge on the PB detected) and held
for at least tDEBOUNCE and VCC > VTH+ (see Figure 7, 8, 9, 10, 11, 12 and 13 for
more details).
b) after long push detection (valid only for the device with option “RST asserted by
long push”). PB has been pressed (falling edge on the PB detected) and held for
more than tDEBOUNCE + tSRD (additional Smart Reset™ delay time can be adjusted
by the external capacitor CSRD) - see Figure 18.
Output type is active low and open drain by default. Open drain output type requires a pull-
up resistor. A 10 kΩ is sufficient in most applications.
INT - interrupt output
While the system is under normal operation (PSHOLD is driven high, power for application is
asserted), the INT is driven low if:
a) VCC falls below VTH- threshold (i.e. undervoltage is detected - see Figure 20 and
21).
b) the falling edge on the PB is detected and the push-button is held for tDEBOUNCE or
more. INT is driven low after tDEBOUNCE and stays low as long as PB is held. The
INT signal is held high during power-up.
The state of the PBOUT output can be used to determine if the interrupt was caused by
either the assertion of the PB input, or was due to the detection of an undervoltage condition
on VCC.
INT output is asserted low for at least tINT_Min.
Output type is active low and open drain by default. Open drain output type requires a pull-
up resistor. A 10 kΩ is sufficient in most applications.
GND - ground
Doc ID 15453 Rev 7
11/51
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet STM6600.PDF ] | |
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