MAX850 Maxim, MAX850 Datasheet - Page 2

• Manufacturer Part Number: MAX850
• Description: Low-Noise / Regulated / Negative Charge-Pump Power Supplies for GaAsFET Bias
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
V
V
V
SHDN or OSC (pin 4) Voltage to GND.........-0.3V to (V
Continuous Power Dissipation (T
Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
Note 1: The output may be shorted to NEGOUT or GND if the package power dissipation is not exceeded. Typical short-circuit
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
(+5V ≤ V
wave between GND and V
Note 2: The supply voltage can drop to 4.5V, but the output may no longer sink 5mA at -4.1V.
Note 3: The MAX852 will operate with a 50kHz to 250kHz square wave of 40% to 60% duty cycle. For best performance, use an
2
Supply Voltage Range (Note 2)
NEGOUT
IN to
OUT
Output Voltage
Output Voltage Range
Set Voltage
Supply Current
Shutdown Supply Current
V
V
Oscillator Frequency (Note 3)
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
SO (derate 5.88mW/°C above +70°C) ........................471mW
OUT
OUT
to GND (Note 1) ........................................V
_____________________________________________________________________________________
V
NEGOUT
Load Regulation
Ripple
80kHz to 120kHz square wave with 50% duty cycle.
current to GND is 50mA.
IN
to GND ...................................................-10.5V to 0.3V
PARAMETER
≤ +10V, GND = 0V, V
.........................................................-0.3V to 21V
IN
to GND ..................................-0.3V to 10.5V
IN
is applied to OSC on the MAX852.)
A
OUT
= +70°C)
SYMBOL
V
I
V
= -4.1V, R
f
SHUT
FBset
OSC
C
V
V
V
OUT
I
I
IN
Q
IH
IN
IN
IL
MAX850–MAX852, V
R
MAX853, V
R
MAX850–MAX852, no load, Figure 2b
MAX850/MAX853, V
MAX851, SHDN = 2V
MAX852, OSC low
MAX850–MAX852, V
R
MAX853, V
R
MAX850–MAX852
MAX853
MAX850/MAX851/MAX853, T
Pin 4
Pin 4
Pin 4
Pin 4
NEGOUT
L
L
L
L
L
= ∞, T
= ∞ or 820Ω, Figure 2a
= ∞ or 820Ω, Figure 2c
= ∞ or 820Ω, Figure 2a
= ∞ or 820Ω, Figure 2c
IN
+ 0.3V)
A
to 0.3V
= T
CTRL
CTRL
MIN
CONDITIONS
= 4.1V,
= 4.1V,
to T
IN
FB
FB
Operating Temperature Ranges
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX
= 10V, SHDN = 0V
= 0V,
= 0V,
MAX85_ISA ......................................................-25°C to +85°C
MAX85_ESA.....................................................-40°C to +85°C
, unless otherwise noted. A 100kHz, 50% duty cycle square
A
= +25°C
-1.32
-4.3
-4.2
MIN
2.0
80
5
-0.5 to -(V
0.002
-4.1
-1.28
TYP
100
2.0
10
2
4
3
2
1
IN
- 1)
MAX
-1.24
-4.0
-3.9
3.0
120
10
0.5
±1
1
5
1
8
8
mV/mA
UNITS
mVp-p
kHz
mA
µA
µA
pF
V
V
V
V
V
V