ICL7663SACBAZA-T Intersil, ICL7663SACBAZA-T Datasheet - Page 6

• Manufacturer Part Number: ICL7663SACBAZA-T
• Description: IC VOLT REG POS LO PWR 8-SOIC
• Manufacturer: Intersil

Specifications of ICL7663SACBAZA-T

• Reference Type: Series, Adjustable
• Voltage - Output: 1.29 ~ 16 V
• Tolerance: ±1%
• Temperature Coefficient: 100ppm/°C
• Voltage - Input: 1.6 ~ 16 V
• Number Of Channels: 1
• Current - Quiescent: 10µA
• Current - Output: 40mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Cathode: -

Detailed Description
The ICL7663S is a CMOS integrated circuit incorporating all
the functions of a voltage regulator plus protection circuitry
on a single monolithic chip. Referring to the Functional
Diagram, the main blocks are a bandgap-type voltage
reference, an error amplifier, and an output driver with both
PMOS and NPN pass transistors.
The bandgap output voltage, trimmed to 1.29V ±15mV for
the ICL7663SA, and the input voltage at the V
are compared in amplifier A. Error amplifier A drives a
P-channel pass transistor which is sufficient for low (under
about 5mA) currents. The high current output is passed by
an NPN bipolar transistor connected as a follower. This
configuration gives more gain and lower output impedance.
Logic-controlled shutdown is implemented via a N-Channel
MOS transistor. Current-sensing is achieved with
comparator C, which functions with the V
ICL7663S has an output (V
which can be used in combination with amplifier A to
generate programmable-temperature-coefficient output
voltages.
The amplifier, reference and comparator circuitry all operate
at bias levels well below 1µA to achieve extremely low
quiescent current. This does limit the dynamic response of
the circuits, however, and transients are best dealt with
outside the regulator loop.
Basic Operation
The ICL7663S is designed to regulate battery voltages in the
5V to 15V region at maximum load currents of about 5mA to
30mA. Although intended as low power devices, power
dissipation limits must be observed. For example, the power
dissipation in the case of a 10V supply regulated down to 2V
with a load current of 30mA clearly exceeds the power
dissipation rating of the Mini-DIP:
(10 - 2) (30) (10
The circuit of Figure 8 illustrates proper use of the device.
CMOS devices generally require two precautions: every
input pin must go somewhere, and maximum values of
applied voltages and current limits must be rigorously
observed. Neglecting these precautions may lead to, at the
least, incorrect or nonoperation, and at worst, destructive
device failure. To avoid the problem of latchup, do not apply
inputs to any pins before supply voltage is applied.
Input Voltages - The ICL7663S accepts working inputs of
1.5V to 16V. When power is applied, the rate-of-rise of the
input may be hundreds of volts per microsecond. This is
potentially harmful to the regulators, where internal
operating currents are in the nanoampere range. The
0.047µF capacitor on the device side of the switch will limit
inputs to a safe level around 2V/µs. Use of this capacitor is
suggested in all applications. In severe rate-of-rise cases, it
-3
) = 240mW
TC
6
) from a buffer amplifier (B),
OUT2
SET
terminal. The
terminal
ICL7663S
may be advisable to use an RC network on the SHutDowN
pin to delay output turn-on. Battery charging surges,
transients, and assorted noise signals should be kept from
the regulators by RC filtering, zener protection, or even
fusing.
NOTES:
10. S
Output Voltages - The resistor divider R
scale the reference voltage, V
using the formula V
arrangements of these resistors, using a potentiometer,
enables exact values for V
applications the potentiometer may be eliminated by using
the ICL7663SA. The ICL7663SA has V
guaranteed to be 1.29V ±15mV and when used with ±1%
tolerance resistors for R
will be within ±2.7% of ideal.
The low leakage current of the V
R
drain current. However, some load current is required for
proper operation, so for extremely low-drain applications it is
necessary to draw at least 1µA. This can include the current
for R
Output voltages up to nearly the V
at low load currents, while the low limit is the reference
voltage. The minimum input-output differential in each
regulator is obtained using the V
output differential increases to 1.5V when using V
Output Currents - Low output currents of less than 5mA are
obtained with the least input-output differential from the
V
currents are needed, use V
open in this case).
7. S
8. Close S
9. IQ quiescent currents measured at GND pin by meter M.
OUT1
2
+
-
to be tens of megohms for minimum additional quiescent
both V
0.047µF
2
1
3
when closed disables output current limiting.
when ON, permits normal operation, when OFF, shuts down
and R
terminal (connect V
OUT1
2
for V
1
FIGURE 7. ICL7663S TEST CIRCUIT
.
GND
and V
M
OUT1
+
-
I
SENSE
Q
V
V
SHDN
OUT
OUT2
OUT1
V
OUT2
V
SET
, open S
TC
1
= (1 + R
.
and R
OUT
S
OUT2
OUT2
3
S
2
2
(7663 ONLY)
ON
OFF
SET
for V
to be obtained. In most
2
OUT1
SET
2
to V
(V
, to the desired output
the initial output voltage
/R
IN
1MΩ
R
S
OUT2
OUT1
1
CL
1
supply may be obtained
) V
terminal allows R
OUT1
, terminal. The input-
SET
.
SET
2
, should be left
/R
1.4V < V
). Where higher
1µA MIN
R
. Suitable
voltage
R
1
V
2
1
OUT
is used to
R
L
SHDN
OUT2
July 21, 2005
FN3180.5
< V+
1
.
C
and
L
IN