High-Accuracy, High-Side Current Monitors
in SOT23
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
SHORT-CIRCUIT RESPONSE
(VBIAS = 22V)
TA = +120°C
A
B
C
CH1
0A
10ms/div
CH1: IBIAS, 10mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
VOLTAGE DROP
vs. REFERENCE CURRENT
1.40
VBIAS = 2.7V
1.20
1.00
0.80
A
0.60
B
0.40 C
0.20 D
0
100n
A: TA = -40°C
B: TA = +25°C
C: TA = +85°C
D: TA = +100°C
1µ 10µ 100µ 1m 10m
REFERENCE CURRENT (A)
Pin Description
PIN
MAX4004
MAX4006
1
1
2
2
3
—
4
4
5
5
6
6
—
3
NAME
CLAMP
GND
OUT
REF
N.C.
BIAS
OUT
FUNCTION
Clamp Voltage Input. External potential used for voltage
clamping of VOUT.
Ground
Current-Monitor Output. OUT sources a current of 1/10th IREF.
Reference Current Output. REF provides the source current to
the cathode of the photodiode.
No Connection. Not internally connected.
Bias Voltage Input. Bias voltage for photodiode.
Current-Monitor Output. OUT presents a voltage proportional to
IREF at 1V/mA. An internal 10kΩ resistor connects OUT to GND
(see Functional Diagram).
6 _______________________________________________________________________________________