NEC UPD16901GS Datasheet
DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD16901
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
µ
PD16901GS 14-pin plastic SOP (300 mil)
BLOCK DIAGRAM
Reference
voltage circuit
β
ON/OFF V
Startup
circuit
IN
Timer latch short-circuit
protection circuit
F/F
C
DLY
C1HC1LC
Charge pump
circuit
2
V
SW
SW
FB R
The information in this document is subject to change without notice.
Document No. S10643EJ2V0DS00 (2nd edition)
Date Published May 1997 N
Printed in Japan
Oscillation
circuit
T
Overcurrent
detection circuit
GND
C.S.
©
1997
ABSOLUTE MAXIMUM RATINGS (TA = 25 ˚C unless specified otherwise)
Item Symbol Condition Rating Unit
Supply voltage VIN 7.0 V
Output voltage VSW 20 V
Total power dissipation PT Note 0.9 W
Operating ambient temperature TA –20 to 85 ˚C
Storage temperature range Tstg –55 to +150 ˚C
Note When 90 mm × 90 mm × 1.6 mm thick glass epoxy board is mounted
RECOMMENDED OPERATING RANGE
Item Symbol MIN. TYP. MAX. Unit
Supply voltage VDD 4.5 5.0 5.5 V
Charge pump capacitor C1, C2 0.033 0.1 0.47
Operating ambient temperature TA 070˚C
µ
F
µ
PD16901
ELECTRICAL SPECIFICATIONS (TA = 25 ˚C, VIN = 5 V unless specified otherwise)
Item Symbol Condition MIN. TYP. MAX. Unit
(Oscillation block)
Oscillation frequency fOSC RT = 68 kΩ 153 167 181 kHz
On duty DUTY 67 %
(Low voltage misoperation preventive circuit)
Operation start voltage VIN(start-up) 3.3 3.7 4.3 V
Operation stop voltage VIN(stop) 2.7 3.2 3.8 V
Hysteresis width VHYS 0.3 0.5 0.7 V
(Overcurrent detection block)
Overcurrent detection voltage VDET 270 300 330 mV
(On/off control block)
ON/OFF pin input voltage VIH 4.5 V ≤ VIN ≤ 5.5 V VIN*0.7 V
VIL 4.5 V ≤ VIN ≤ 5.5 V VIN*0.3 V
ON/OFF pin input current IIL ON/OFF pin voltage = 0 –20 –5 –1
(Charge pump circuit)
Output voltage VCHG 4.5 V ≤ VIN ≤ 5.5 V 8.0 11 V
0 ˚C ≤ TA ≤ 70 ˚C
(Short-circuit protection circuit)
Timer latch pin output current ISCP RT = 68 kΩ 2.0 3.3 4.5
Timer latch detection voltage VDETT 0.85 1.0 1.15 V
(Output block)
Output stage on resistance RDS(ON) IPK = 0.5 A 0.3 0.5 Ω
Output stage leakage current IDSOFF VDS = 20 V 1.0 µA
µ
A
µ
A
2
PIN CONFIGURATION (Top View)
C
14
µ
PD16901
V
2
NC11NC10NC9CS8FB
SW
13
12
1
C
2
3
C
1H
V
1L
CC
4
ON/OFF
5
R
6
C
T
DLY
7
GND
CONTROL
3
PACKAGE DRAWINGS
14 PIN PLASTIC SOP (300 mil)
14 8
17
detail of lead end
P
µ
PD16901
A
G
F
E
C
M
D
NOTE
Each lead centerline is located within 0.12 mm (0.005 inch) of
its true position (T.P.) at maximum material condition.
M
B
H
I
J
K
L
ITEM MILLIMETERS INCHES
A
10.46 MAX.
B
1.42 MAX.
C
1.27 (T.P.)
D 0.40 0.016
E
F
G
H
I
J
K 0.20
L 0.6±0.2 0.024
M
N
P3° 3°
+0.10
–0.05
0.1±0.1
1.8 MAX.
1.55
7.7±0.3
5.6
1.1
+0.10
–0.05
0.12
0.10
+7°
–3°
P14GM-50-300B-4
0.412 MAX.
0.056 MAX.
0.050 (T.P.)
0.004±0.004
0.071 MAX.
0.061
0.303±0.012
0.220
0.043
0.008
0.005
0.004
+7°
–3°
N
+0.004
–0.003
+0.004
–0.002
+0.008
–0.009
4
Loading...