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Details, datasheet, quote on part number:UPD16901
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Datasheet text preview:
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16901
FLASH MEMORY VOLTAGE STEPUP DC/DC CONVERTER IC
The µPD16901 is a DC/DC converter IC which produces a 12 V output from a 5 V input source. The integration of a control circuit and power MOSFET in the output stage on a single-chip allows a power supply for flash memory write and erasure to be configured with a reduced number of external components.
FEATURES
· With an on-chip output stage power MOSFET, fewer external components are needed. · The ALLMOS structure achieves low power consumption. · Internally set output voltage eliminates the need for adjustment. · Output can be turned ON/OFF via an external signal. · A timer latch type overcurrent protection circuit on chip
ORDERING INFORMATION
Part Number Package 14-pin plastic SOP (300 mil)
µP D 1 6 9 0 1 G S
BLOCK DIAGRAM
ON/OFF VIN CDLY C1H C1L C2
Reference voltage circuit
Startup circuit
Timer latch short-circuit protection circuit
Charge pump circuit
VSW F/F SW
Overcurrent detection circuit
Oscillation circuit
C.S.
FB
RT
GND
The information in this document is subject to change without notice. Document No. S10643EJ2V0DS00 (2nd edition) Date Published May 1997 N Printed in Japan
©
1997
µPD16901
ABSOLUTE MAXIMUM RATINGS (TA = 25 °C unless specified otherwise)
Item Supply voltage Output voltage Total power dissipation Operating ambient temperature Storage temperature range Symbol VI N VSW PT TA T stg Note Condition Rating 7.0 20 0.9 20 to 85 55 to +150 Unit V V W °C °C
Note When 90 mm × 90 mm × 1.6 mm thick glass epoxy board is mounted RECOMMENDED OPERATING RANGE
Item Supply voltage Charge pump capacitor Operating ambient temperature Symbol VDD C1, C2 TA MIN. 4.5 0.033 0 TYP. 5.0 0.1 MAX. 5.5 0.47 70 Unit V
µF
°C
ELECTRICAL SPECIFICATIONS
Item (Oscillation block) Oscillation frequency On duty
(TA = 25 °C, VIN = 5 V unless specified otherwise)
Symbol Condition MIN. TYP. MAX. Unit
f OSC DUTY
RT = 68 k
153
167 67
181
kHz %
(Low voltage misoperation preventive circuit) Operation start voltage Operation stop voltage Hysteresis width (Overcurrent detection block) Overcurrent detection voltage (On/off control block) ON/OFF pin input voltage VI H VIL ON/OFF pin input current (Charge pump circuit) Output voltage VCHG 4.5 V VIN 5.5 V 0 °C TA 70 °C 8.0 11 V IIL 4.5 V VIN 5.5 V 4.5 V VIN 5.5 V ON/OFF pin voltage = 0 20 5 VIN * 0 . 7 VIN * 0 . 3 1 V V VDET 270 300 330 mV VI N ( s t a r t - u p ) VI N ( s t o p ) VH Y S 3.3 2.7 0.3 3.7 3.2 0.5 4.3 3.8 0.7 V V V
µA
(Short-circuit protection circuit) Timer latch pin output current Timer latch detection voltage (Output block) Output stage on resistance Output stage leakage current R DS(ON) I DSOFF IPK = 0.5 A VDS = 20 V 0.3 0.5 1.0 I SCP VD E T T RT = 68 k 2.0 0.85 3.3 1.0 4.5 1.15
µA
V
µA
2
µPD16901
PIN CONFIGURATION (Top View)
C2 14 VSW 13 NC 12 NC 11 NC 10 CS 9 FB 8
1 C1H
2 C1L
3 VCC
4
5
6 CDLY
7 GND
ON/OFF RT CONTROL
3
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