MAXIM MAX1721

19-1439; Rev 1; 5/99
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
The ultra-small MAX1719/MAX1720/MAX1721 monolithic,
CMOS charge-pump inverters accept input voltages
ranging from +1.5V to +5.5V. The MAX1720 operates at
12kHz, and the MAX1719/MAX1721 operate at 125kHz.
High efficiency, small external components, and logiccontrolled shutdown make these devices ideal for both
battery-powered and board-level voltage conversion
applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. A typical MAX1719/
MAX1720/MAX1721 application is generating a -5V
supply from a +5V logic supply to power analog circuitry.
All three parts come in a 6-pin SOT23 package and can
deliver a continuous 25mA output current.
For pin-compatible SOT23 switched-capacitor voltage
inverters without shutdown (5-pin SOT23), see the
MAX828/MAX829 and MAX870/MAX871 data sheets. For
applications requiring more power, the MAX860/MAX861
deliver up to 50mA. For regulated outputs (up to -2 · VIN),
refer to the MAX868. The MAX860/MAX861 and MAX868
are available in space-saving µMAX packages.
Applications
Local Negative Supply from a Positive Supply
Features
♦ 1nA Logic-Controlled Shutdown
♦ 6-Pin SOT23 Package
♦ 99.9% Voltage Conversion Efficiency
♦ 50µA Quiescent Current (MAX1719/MAX1720)
♦ +1.5V to +5.5V Input Voltage Range
♦ 25mA Output Current
♦ Requires Only Two 1µF Capacitors
(MAX1719/MAX1721)
Ordering Information
TEMP. RANGE
PINPACKAGE
SOT
TOP MARK
MAX1719EUT
-40°C to +85°C
6 SOT23-6
AACA
MAX1720EUT
-40°C to +85°C
6 SOT23-6
AABS
MAX1721EUT
-40°C to +85°C
6 SOT23-6
AABT
PART
Small LCD Panels
GaAs PA Bias Supply
Handy-Terminals, PDAs
Battery-Operated Equipment
Pin Configuration
Typical Operating Circuit
1µF
INPUT
1.5V to 5.5V
C1+
TOP VIEW
C1OUT
IN
MAX1721
NEGATIVE
OUTPUT
-1 · VIN
25mA
OFF
1
IN
2
C1-
3
1µF
SHDN
ON
OUT
MAX1719
MAX1720
MAX1721
6
C1+
5
SHDN (SHDN)
4
GND
GND
SOT23-6
( ) ARE FOR MAX1719
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX1719/MAX1720/MAX1721
General Description
MAX1719/MAX1720/MAX1721
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +6V
OUT to GND .............................................................-6V to +0.3V
C1+, SHDN, SHDN to GND .........................-0.3V to (VIN + 0.3V)
C1- to GND...............................................(VOUT - 0.3V) to +0.3V
OUT Output Current..........................................................100mA
OUT Short Circuit to GND..............................................Indefinite
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C).................696mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V IN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10µF (MAX1720), C1 = C2 = 1µF
(MAX1719/MAX1721), circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Supply Voltage Range
SYMBOL
VIN
Quiescent Supply Current
ICC
Shutdown Supply Current
ISHDN
Oscillator Frequency
fOSC
Voltage Conversion Efficiency
Output Resistance (Note 1)
OUT to GND
Shutdown Resistance
RO
RO, SHDN
VIH
SHDN/ SHDN Input Logic Low
VIL
Wake-Up Time from Shutdown
2
IIL, IIH
MIN
TYP
MAX
MAX1720
RL = 10kΩ
TA = +25°C
TA = 0°C to + 85°C
1.5
5.5
MAX1719/MAX1721
RL = 10kΩ
TA = +25°C
1.4
5.5
TA = 0°C to + 85°C
1.5
5.5
TA = +25°C
1.25
5.5
MAX1720
50
90
MAX1719/MAX1721
350
650
0.001
1
SHDN = IN (MAX1719), TA = +25°C
SHDN = GND
(MAX1720/MAX1721) TA = +85°C
TA = +25°C
IOUT = 10mA
7
12
17
70
125
180
99
99.9
TA = +25°C
23
TA = 0°C to +85°C
4
12
2.0
+2.5V ≤ VIN ≤ +5.5V
0.6
VIN (MIN) ≤ VIN ≤ +2.5V
0.2
IOUT = 5mA
-100
kHz
Ω
Ω
V
VIN - 0.2
SHDN/ SHDN = GND TA = +25°C
or VIN
TA = +85°C
µA
%
50
65
SHDN = IN (MAX1719), SHDN = GND
(MAX1720/MAX1721), OUT is internally
forced to GND in shutdown
VIN (MIN) ≤ VIN ≤ +2.5V
V
µA
MAX1719/MAX1721
+2.5V ≤ VIN ≤ +5.5V
UNITS
0.02
MAX1720
IOUT = 0, TA = +25°C
SHDN/ SHDN Input Logic High
SHDN/ SHDN Bias Current
CONDITIONS
0.05
10
MAX1720
800
MAX1719/MAX1721
80
_______________________________________________________________________________________
100
V
nA
µs
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
(V IN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10µF (MAX1720), C1 = C2 = 1µF
(MAX1719/MAX1721), circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MAX1719/MAX1721
1.6
5.5
RL = 10kΩ
Quiescent Current
ICC
MAX1719/MAX1720/MAX1721
Oscillator Frequency
fOSC
Output Current
RO
IOUT
OUT to GND Shutdown
Resistance
RO, SHDN
SHDN/ SHDN Input Logic High
VIH
SHDN/ SHDN Input Logic Low
VIL
MAX
5.5
VIN
Output Resistance (Note 1)
TYP
1.5
Supply Voltage Range
Voltage Conversion Efficiency
MIN
MAX1720
UNITS
V
100
µA
750
MAX1720
6
21
MAX1719/MAX1721
60
200
IOUT = 0
99
kHz
%
IOUT = 10mA
65
Ω
Continuous, long-term
25
mARMS
SHDN = IN (MAX1719), SHDN = GND
(MAX1720/MAX1721), OUT is internally
forced to GND in shutdown
12
Ω
+2.5V ≤ VIN ≤ +5.5V
2.0
VIN (MIN) ≤ VIN ≤ +2.5V
V
VIN - 0.2
+2.5V ≤ VIN ≤ +5.5V
0.6
VIN (MIN) ≤ VIN ≤ +2.5V
0.2
V
Note 1: Capacitor contribution (ESR component plus (1/fOSC) · C) is approximately 20% of output impedance.
Note 2: All specifications from -40°C to +85°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuit of Figure 1, VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = C3, TA = +25°C, unless otherwise noted.)
90
-2
VIN = +3.3V
-3
-4
VIN = +5V
-5
VIN = +5V
80
EFFICIENCY (%)
OUTPUT VOLTAGE (V)
-1
100
70
60
VIN = +1.5V
50
VIN = +2V
VIN = +3.3V
40
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
90
VIN = +5V
80
70
60
VIN = +1.5V
50
VIN = +3.3V
VIN = +2V
40
30
30
20
20
10
10
0
0
0
100
EFFICIENCY (%)
VIN = +2V
MAX1720/21toc02
VIN = +1.5V
MAX1720/21toc01
0
MAX1719/MAX1721
EFFICIENCY vs. OUTPUT CURRENT
MAX1720
EFFICIENCY vs. OUTPUT CURRENT
MAX1720/21toc03
OUTPUT VOLTAGE
vs. OUTPUT CURRENT
0
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
0
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
_______________________________________________________________________________________
3
MAX1719/MAX1720/MAX1721
ELECTRICAL CHARACTERISTICS
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = C3, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1719/
MAX1721
30
MAX1720
250
-40°C
150
MAX1720
-40°C
50
10
2.0
2.5
3.0
3.5
4.0
4.5
5.0
+85°C
0
1.5
5.5
2.0
2.5
INPUT VOLTAGE (V)
FREQUENCY (kHz)
VIN = +2V
40
VIN = +3.3V
30
35
5.0
60
MAX1720/21toc06
VIN = +1.5V
-40
-15
85
VOUT
MAX1721
VOUT
MAX1720
-15
-10
MAX1720
35
60
35
VIN = +4.75V, VOUT = -4.0V
30
OUTPUT CURRENT (mA)
60
MAX1719/MAX1721
MAX1720
OUTPUT VOLTAGE RIPPLE
vs. CAPACITANCE
25
VIN = +3.15V, VOUT = -2.5V
20
15
10
10µs/div
VIN = 3.3V, VOUT = -3.17V, IOUT = 5mA
20mV/div, AC-COUPLED
85
MAX1720
OUTPUT CURRENT vs. CAPACITANCE
V SHDN
5V/div
35
OUTPUT NOISE AND RIPPLE
MAX1720
START-UP FROM SHUTDOWN
VOUT
2V/div
10
TEMPERATURE (°C)
100
10
-40
85
MAX1720/21toc10
VIN = +1.9V, VOUT = -1.5V
5
500
450
400
VIN = +4.75V, VOUT = -4.0V
350
300
VIN = +3.15V, VOUT = -2.5V
250
200
VIN = +1.9V, VOUT = -1.5V
150
100
50
0
4
5
5.5
TEMPERATURE (°C)
RL = 1kΩ
VIN = +3.3V
0
4.5
TEMPERATURE (°C)
500µs/div
10
MAX1720/21toc08
VIN = +1.5V
VIN = +5V
VIN = +5V
VIN = +1.5V
10
10
VIN = +5V
15
MAX1720/21toc09
VIN = +5V
-15
4.0
1000
MAX1720/21toc07
VIN = +1.5V
60
-40
3.5
20
PUMP FREQUENCY
vs. TEMPERATURE
70
20
3.0
25
INPUT VOLTAGE (V)
OUTPUT RESISTANCE
vs. TEMPERATURE
50
MAX1720/21toc05
200
100
20
1.5
+85°C
OUTPUT VOLTAGE RIPPLE (mVp-p)
40
300
MAX1720/21toc11
50
350
30
MAX1720/21toc12
60
MAX1719/
MAX1721
400
SUPPLY CURRENT (µA)
70
OUTPUT RESISTANCE (Ω)
450
MAX1720/21toc04
80
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
SHUTDOWN SUPPLY CURRENT (nA)
OUTPUT RESISTANCE
vs. INPUT VOLTAGE
OUTPUT RESISTANCE (Ω)
MAX1719/MAX1720/MAX1721
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
0
0
5
10 15 20 25 30 35 40 45 50
CAPACITANCE (µF)
0
5
10
15
20
CAPACITANCE (µF)
_______________________________________________________________________________________
25
30
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
MAX1719/MAX1721
OUTPUT VOLTAGE RIPPLE vs. CAPACITANCE
MAX1719/MAX1721
OUTPUT CURRENT vs. CAPACITANCE
VIN = +4.75V, VOUT = -4.0V
VSHDN
5V/div
OUTPUT CURRENT (mA)
30
VOUT
2V/div
MAX1720/21toc14
35
25
VIN = +3.15V, VOUT = -2.5V
20
15
10
VIN = +1.9V, VOUT = -1.5V
5
350
300
VIN = +4.75V, VOUT = -4.0V
250
200
VIN = +3.15V, VOUT = -2.5V
150
VIN = +1.9V, VOUT = -1.5V
100
50
0
0
0
50µs/div
400
MAX1720/21toc15
MAX1720/21toc13
OUTPUT VOLTAGE RIPPLE (mVp-p)
MAX1721
START-UP FROM SHUTDOWN
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
CAPACITANCE (µF)
CAPACITANCE (µF)
RL = 1kΩ
Pin Description
PIN
MAX1719
MAX1720
MAX1721
NAME
FUNCTION
1
1
OUT
2
2
IN
3
3
C1-
4
4
GND
Ground
5
–
SHDN
Noninverting Shutdown Input. Drive this pin low for normal operation; drive it high for
shutdown mode. OUT is actively pulled to ground during shutdown.
–
5
SHDN
Inverting Shutdown Input. Drive this pin high for normal operation; drive it low for
shutdown mode. OUT is actively pulled to ground during shutdown.
6
6
C1+
Inverting Charge-Pump Output
Power-Supply Positive Voltage Input
Negative Terminal of Flying Capacitor
Positive Terminal of Flying Capacitor
Detailed Description
The MAX1719/MAX1720/MAX1721 capacitive charge
pumps invert the voltage applied to their input. For highest performance, use low equivalent series resistance
(ESR) capacitors (e.g., ceramic).
During the first half-cycle, switches S2 and S4 open,
switches S1 and S3 close, and capacitor C1 charges to
the voltage at IN (Figure 2). During the second half-
cycle, S1 and S3 open, S2 and S4 close, and C1 is level
shifted downward by VIN volts. This connects C1 in parallel with the reservoir capacitor C2. If the voltage across
C2 is smaller than the voltage across C1, charge flows
from C1 to C2 until the voltage across C2 reaches
-VIN. The actual voltage at the output is more positive
than -VIN, since switches S1–S4 have resistance and the
load drains charge from C2.
_______________________________________________________________________________________
5
MAX1719/MAX1720/MAX1721
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = C3, TA = +25°C, unless
otherwise noted.)
MAX1719/MAX1720/MAX1721
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
f
C1
1µF (10µF)
INPUT
1.5V to 5.5V
2
6
C1+
IN
OUT
C3
1µF (10µF)
5
ON
OFF
V+
3
C1-
1
RL
MAX1719*
MAX1721
SHDN
NEGATIVE
OUTPUT
-1 · VIN
25mA
VOUT
C1
RL
C2
1µF (10µF)
Figure 3a. Switched-Capacitor Model
GND
4
REQUIV
V+
NOTE: ( ) CAPACITORS ARE FOR MAX1720.
*ON/OFF POLARITY OF SHDN IS REVERSED FOR MAX1719.
VOUT
1
REQUIV =
f × C1
Figure 1. Typical Application Circuit
S1
C2
C2
RL
S2
IN
Figure 3b. Equivalent Circuit
C1
S3
S4
C2
VOUT = -(VIN)
Figure 2. Ideal Voltage Inverter
Charge-Pump Output
The MAX1719/MAX1720/MAX1721 are not voltage regulators: the charge pumps’ output resistance is
approximately 23Ω at room temperature (with VIN =
+5V), and VOUT approaches -5V when lightly loaded.
VOUT will droop toward GND as load current increases.
The droop of the negative supply (VDROOP-) equals the
current draw from OUT (IOUT) times the negative converter’s output resistance (RO):
VDROOP- = IOUT · RO
The negative output voltage will be:
VOUT = -(VIN - VDROOP-)
Efficiency Considerations
The power efficiency of a switched-capacitor voltage
converter is affected by three factors: the internal losses in the converter IC, the losses in the power switches,
and the resistive losses of the pump capacitors. The
total power loss is:
ΣPLOSS = PINTERNAL LOSSES +PSWITCH LOSSES
The internal losses are associated with the IC’s internal
functions, such as driving the switches, oscillator, etc.
These losses are affected by operating conditions such
as input voltage, temperature, and frequency.
The other two losses are associated with the voltage
converter circuit’s output resistance. Switch losses
occur because of the on-resistance of the MOSFET
switches in the IC. Charge-pump capacitor losses
occur because of their ESR. The relationship between
these losses and the output resistance is as follows:
PSWITCH LOSSES + PPUMP CAPACITOR LOSSES
= IOUT
RO ≅
(
2
1
fOSC
⋅ RO
) ⋅ C1
+ 2RSWITCHES + 4ESRC1 + ESRC2
where fOSC is the oscillator frequency. The first term is
the effective resistance from an ideal switchedcapacitor circuit. See Figures 3a and 3b.
Shutdown Mode
The MAX1719/MAX1720/MAX1721 have a logic-controlled shutdown input. Driving SHDN low places the
MAX1720/MAX1721 in a low-power shutdown mode.
The MAX1719’s shutdown input is inverted from that of
the MAX1720/MAX1721. Driving SHDN high places the
MAX1719 in a low-power shutdown mode. The chargepump switching halts, supply current is reduced to
1nA, and OUT is actively pulled to ground through a 4Ω
resistance.
+PPUMP CAPACITOR LOSSES
6
_______________________________________________________________________________________
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
…
Capacitor Selection
2
To maintain the lowest output resistance, use capacitors with low ESR (Table 1). The charge-pump output
resistance is a function of C1’s and C2’s ESR.
Therefore, minimizing the charge-pump capacitor’s
ESR minimizes the total output resistance. Table 2
gives suggested capacitor values for minimizing output
resistance or minimizing capacitor size.
3
6
IOUT
⋅ C2
+2
4
C1
1
5
6
C2
SHDN (MAX1719)
SHDN (MAX1720/
MAX1721)
MAX1719
MAX1720
MAX1721
“n”
1
VOUT
C2
5
VOUT = -nVIN
Figure 4. Cascading MAX1719s or MAX1720s or MAX1721s
to Increase Output Voltage
Voltage Inverter
The most common application for these devices is a
charge-pump voltage inverter (Figure 1). This application requires only two external components—capacitors
C1 and C2—plus a bypass capacitor, if necessary.
Refer to the Capacitor Selection section for suggested
capacitor types.
Output Capacitor (C2)
Increasing the output capacitor’s value reduces the
output ripple voltage. Decreasing its ESR reduces both
output resistance and ripple. Lower capacitance values
can be used with light loads if higher output ripple can
be tolerated. Use the following equation to calculate the
peak-to-peak ripple:
2 x fOSC
MAX1719
MAX1720
MAX1721
“1”
2
3
…
Flying Capacitor (C1)
Increasing the flying capacitor’s value reduces the output resistance. Above a certain point, increasing C1’s
capacitance has a negligible effect because the output
resistance becomes dominated by the internal switch
resistance and capacitor ESR.
VRIPPLE =
4
C1
+VIN
Cascading Devices
Two devices can be cascaded to produce an even
larger negative voltage (Figure 4). The unloaded output
voltage is normally -2 · VIN, but this is reduced slightly
by the output resistance of the first device multiplied by
the quiescent current of the second. When cascading
more than two devices, the output resistance rises dramatically. For applications requiring larger negative
voltages, see the MAX865 and MAX868 data sheets.
⋅ IOUT ⋅ ESRC2
Input Bypass Capacitor (C3)
Bypass the incoming supply to reduce its AC impedance
and the impact of the MAX1719/MAX1720/MAX1721’s
switching noise. A bypass capacitor with a value equal
to that of C1 is recommended.
Table 1. Low-ESR Capacitor Manufacturers
PRODUCTION
METHOD
Surface-Mount
Tantalum
Surface-Mount
Ceramic
MANUFACTURER
SERIES
PHONE
FAX
AVX
TPS series
803-946-0690
803-626-3123
Matsuo
267 series
714-969-2491
714-960-6492
Sprague
593D, 595D series
603-224-1961
603-224-1430
AVX
X7R
803-946-0690
803-626-3123
Matsuo
X7R
714-969-2491
714-960-6492
Table 2. Capacitor Selection for Minimum Output Resistance or Capacitor Size
fOSC
CAPACITORS TO MINIMIZE
OUTPUT RESISTANCE
(RO = 23Ω, TYP)
C1 = C2
MAX1720
12kHz
10µF
3.3µF
MAX1719/MAX1721
125kHz
1µF
0.33µF
PART
CAPACITORS TO MINIMIZE SIZE
(RO = 40Ω, TYP)
C1 = C2
_______________________________________________________________________________________
7
MAX1719/MAX1720/MAX1721
Applications Information
MAX1719/MAX1720/MAX1721
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
2
2
3
C1
4
6
SHDN (MAX1719)
SHDN (MAX1720/
MAX1721)
MAX1719
MAX1720
MAX1721
“1”
SHDN (MAX1719)
SHDN (MAX1720/
MAX1721)
…
+VIN
3
4
C1
1
6
…
5
+VIN
5
3
MAX1719
MAX1720
MAX1721
“n”
C1
1
VOUT
4
6
D1, D2 = 1N4148
2
MAX1719
MAX1720
MAX1721
D1
1
VOUT = -VIN
C2
5
VOUT = -VIN
D2
C2
RO OF SINGLE DEVICE
RO = NUMBER OF DEVICES
C4
C3
Figure 5. Paralleling MAX1719s or MAX1720s or MAX1721s to
Reduce Output Resistance
Figure 6. Combined Doubler and Inverter
Paralleling Devices
Paralleling multiple MAX1719s, MAX1720s, or
MAX1721s reduces the output resistance. Each device
requires its own pump capacitor (C1), but the reservoir
capacitor (C2) serves all devices (Figure 5). Increase
C2’s value by a factor of n, where n is the number of
parallel devices. Figure 5 shows the equation for calculating output resistance.
Combined Doubler/Inverter
In the circuit of Figure 6, capacitors C1 and C2 form the
inverter, while C3 and C4 form the doubler. C1 and C3
are the pump capacitors; C2 and C4 are the reservoir
capacitors. Because both the inverter and doubler use
part of the charge-pump circuit, loading either output
causes both outputs to decline toward GND. Make sure
the sum of the currents drawn from the two outputs
does not exceed 25mA.
VOUT = (2VIN) (VFD1) - (VFD2)
GND
MAX1719
MAX1720
MAX1721
4
V+
RL
OUT
1
Figure 7. Heavy Load Connected to a Positive Supply
OUT require a Schottky diode (1N5817) between GND
and OUT, with the anode connected to OUT (Figure 7).
Layout and Grounding
Good layout is important, primarily for good noise performance. To ensure good layout, mount all components as close together as possible, keep traces short
to minimize parasitic inductance and capacitance, and
use a ground plane.
Heavy Load Connected to a
Positive Supply
Under heavy loads, where a higher supply is sourcing
current into OUT, the OUT supply must not be pulled
above ground. Applications that sink heavy current into
Chip Information
TRANSISTOR COUNT: 85
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