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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1822 Datasheet

High-Side Power Supply

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MAX1822 pdf
19-1892; Rev 0; 1/01
High-Side Power Supply
_______________General Description
The MAX1822 high-side supply, using a regulated
charge pump, generates a regulated output voltage
11V greater than the input supply voltage to power
high-side switching and control circuits. The MAX1822
allows low-resistance N-channel MOSFETs (FETs) to be
used in circuits that normally require costly, less effi-
cient P-channel FETs and PNP transistors. The high-
side output also eliminates the need for logic FETs in
+5V and other low-voltage switching circuits.
A +3.5V to +16.5V input supply range and a typical qui-
escent current of only 150µA make the MAX1822 ideal
for a wide range of line- and battery-powered switching
and control applications where efficiency is crucial.
Also provided is a logic-level power-ready output (PR)
to indicate when the high-side voltage reaches the
proper level.
The MAX1822 comes in an 8-pin SO package and
requires three inexpensive external capacitors. The
MAX1822 is a pin-for-pin replacement to the MAX622.
____________________________Features
o +3.5V to +16.5V Operating Supply Voltage Range
o Output Voltage Regulated to VCC + 11V (typ)
o 150µA (typ) Quiescent Current
o Power-Ready Output
PART
MAX1822ESA
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 SO
________________________Applications
High-Side Power Control with N-Channel FETs
Low-Dropout Voltage Regulators
Power Switching from Low Supply Voltages
H-Switches
Stepper Motor Drivers
Battery-Load Management
Portable Computers
Typical Operating Circuit
+3.5V TO +16.5V
0.1µF
CERAMIC
C1
C2
1
C1+
8
VCC
C3
7 C1-
VOUT 5 +12.5V TO +27.5V
6
C2+
MAX1822
2 C2-
GND
4
3
PR
Pin Configuration
TOP VIEW
C1+ 1
C2- 2
PR 3
GND 4
MAX1822
8 VCC
7 C1-
6 C2+
5 VOUT
SO
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1822 Datasheet

High-Side Power Supply

No Preview Available !

MAX1822 pdf
High-Side Power Supply
ABSOLUTE MAXIMUM RATINGS
VCC ......................................................................................+17V
VOUT ....................................................................................+30V
IOUT ...................……………………………………………….25mA
Continuous Total Power Dissipation (TA = +70°C)
8-pin SO (derate 5.88mW/°C above +70°C)...............471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+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
(VCC = +5V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
Supply Voltage
SYMBOL
VCC
CONDITIONS
IOUT = 0, VCC = 3.5V,
C1 = C2 = 0.047µF, C3 = 1µF
IOUT = 0, VCC = 4.5V, C1 = C2 = 0.047µF,
C3 = 1µF
High-Side Voltage (Note 1)
VOUT
IOUT = 0, VCC = 16.5V, C1 = C2 = 0.01µF,
C3 = 1µF (Note 2)
IOUT = 50µA, VCC = 3.5V,
C1 = C2 = 0.047µF, C3 = 1µF
IOUT = 250µA, VCC = 5V,
C1 = C2 = 0.047µF, C3 = 1µF
IOUT = 500µA, VCC = 16.5V,
C1 = C2 = 0.01µF, C3 = 1µF (Note 2)
Power-Ready Threshold
Power-Ready Output High
Power-Ready Output Low
Output Voltage Ripple
Switching Frequency
Quiescent Supply Current
PRT
PROH
PROL
VR
FO
IQ
IOUT = 0 (Note 3)
ISOURCE = 100µA
ISINK = 1mA
C1 = C2 = 0.01µF, C3 = 10µF,
IOUT = 1mA, VCC = 16.5V
IOUT = 0, VCC = 5V, C1 = C2 = 0.047µF,
C3 = 1µF, TA = +25°C
IOUT = 0, VCC = 16.5V, C1 = C2 = 0.047µF,
C3 = 1µF, TA = +25°C
MIN
3.5
11.5
TYP
12.5
MAX UNITS
16.5 V
16.5
14.5 15.5 17.5
26.5 27.5 29.5
8.5 10.5 16.5
V
15 18
26.5
12
3.8
13.5
4.3
50
90
150
150
29.5
14.5
5
0.4
500
350
V
V
V
mV
kHz
µA
Note 1: High-side voltage measured with respect to ground.
Note 2: For VCC > +13V on the MAX1822, use C1 = C2 = 0.01µF.
Note 3: Power-Ready Threshold is the voltage with respect to ground at VOUT when PR switches high (PR = VCC).
2 _______________________________________________________________________________________


Part Number MAX1822
Description High-Side Power Supply
Maker Maxim
Total Page 10 Pages
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