MAX840ESA+ Maxim Integrated Products, MAX840ESA+ Datasheet - Page 4

• Manufacturer Part Number: MAX840ESA+
• Description: IC BIAS GAASFET REG 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX840ESA+

• Applications: Charge Pump, Cellular Telephone Transmitter
• Voltage - Input: 2.5 ~ 10 V
• Number Of Outputs: 1
• Voltage - Output: -2V, -0.5 ~ -9.4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Function: Inverting
• Output Voltage: - 2 V, - 0.5 V to - 9.4 V
• Output Current: 4 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Noise, Regulated, -2V GaAsFET Bias
(Circuit of Figure 2a, V
4
____________________________Typical Operating Characteristics (continued)
_______________________________________________________________________________________
V
V
MAX843/MAX844 OUTPUT NOISE AND RIPPLE
IN
150
140
130
120
110
100
IN
70
90
80
= 3.6V, V
= 3.6V, V
MAX840 OUTPUT NOISE AND RIPPLE
2
(C1 = C2 = C3 = 1 F, C4 = 10 F)
(C1 = C2 = C3 = 1 F, C4 = 10 F)
OUT
OUT
3
IN
OSCILLATOR FREQUENCY
= -2V, I
= -2V, I
vs. SUPPLY VOLTAGE
T
= 3.6V, T
4
SUPPLY VOLTAGE (V)
A
= +25°C, +85°C
10 s/div
10 s/div
OUT
5
OUT
= 4mA, AC COUPLED
= 4mA, AC COUPLED
6
A
= +25°C, unless otherwise noted.)
SHDN = HIGH
T
7
A
= -40°C
8
9
10
V
500 V/div
V
500 V/div
OUT
OUT
V
V
MAX843/MAX844 OUTPUT NOISE AND RIPPLE
IN
IN
31
29
27
25
23
21
19
17
15
= 3.6V, V
OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE
= 3.6V, V
(C1 = C2 = C3 = 0.22 F, C4 = 4.7 F)
(C1 = C2 = C3 = 0.22 F, C4 = 4.7 F)
MAX840 OUTPUT NOISE AND RIPPLE
2
OUT
OUT
3
= -2V, I
= -2V, I
T
4
SUPPLY VOLTAGE (V)
A
= +25°C, +85°C
10 s/div
10 s/div
OUT
5
OUT
MAX844
= 4mA, AC COUPLED
= 4mA, AC COUPLED
6
T
A
SHDN = LOW
7
= -40°C
8
9
10
V
1mV/div
V
1mV/div
OUT
OUT