UC384XBD MOTOROLA [Motorola, Inc], UC384XBD Datasheet - Page 3

• Manufacturer Part Number: UC384XBD
• Description: HIGH PERFORMANCE CURRENT MODE CONTROLLERS
• Manufacturer: MOTOROLA [Motorola, Inc]

ELECTRICAL CHARACTERISTICS
the operating ambient temperature range that applies [Note 3], unless otherwise noted.)
ERROR AMPLIFIER SECTION
CURRENT SENSE SECTION
OUTPUT SECTION
UNDERVOLTAGE LOCKOUT SECTION
NOTES: 2. Adjust V CC above the Startup threshold before setting to 15 V.
MOTOROLA ANALOG IC DEVICE DATA
Voltage Feedback Input (V O = 2.5 V)
Input Bias Current (V FB = 5.0 V)
Open Loop Voltage Gain (V O = 2.0 V to 4.0 V)
Unity Gain Bandwidth (T J = 25 C)
Power Supply Rejection Ratio (V CC = 12 V to 25 V)
Output Current
Output Voltage Swing
Current Sense Input Voltage Gain (Notes 4 & 5)
Maximum Current Sense Input Threshold (Note 4)
Power Supply Rejection Ratio
Input Bias Current
Propagation Delay (Current Sense Input to Output)
Output Voltage
Output Voltage with UVLO Activated
Output Voltage Rise Time (C L = 1.0 nF, T J = 25 C)
Output Voltage Fall Time (C L = 1.0 nF, T J = 25 C)
Startup Threshold
Minimum Operating Voltage After Turn–On
Sink (V O = 1.1 V, V FB = 2.7 V)
Source (V O = 5.0 V, V FB = 2.3 V)
High State (R L = 15 k to ground, V FB = 2.3 V)
Low State (R L = 15 k to V ref , V FB = 2.7 V)
(UC284XB, UC384XB)
(UC384XBV)
(UC284XB, UC384XB)
(UC384XBV)
(V CC = 12 V to 25 V) (Note 4)
Low State (I Sink = 20 mA)
High State (I Source = 20 mA, UC284XB, UC384XB)
V CC = 6.0 V, I Sink = 1.0 mA
UCX844B, BV
UCX845B, BV
UCX844B, BV
UCX845B, BV
(UC284XB, UC384XB)
(UC384XBV)
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
4. This parameter is measured at the latch trip point with V FB = 0 V.
5. Comparator gain is defined as: A V =
T low = 0 C for UC3844B, UC3845B
T low
T low
= – 25 C for UC2844B, UC2845B
= – 40 C for UC3844BV, UC3845BV
(I Sink = 200 mA, UC284XB, UC384XB)
(I Sink = 200 mA, UC384XBV)
(I Source = 20 mA, UC384XBV)
(I Source = 200 mA)
Characteristic
(V CC = 15 V [Note 2], R T = 10 k, C T = 3.3 nF. For typical values T A = 25 C, for min/max values T A is
D
D
V Output Compensation
V Current Sense Input
UC3844B, 45B UC2844B, 45B
T
T h igh
T high = + 70 C for UC3844B, UC3845B
high
= + 85 C for UC2844B, UC2845B
= +105 C for UC3844BV, UC3845BV
t PLH(In/Out)
V OL(UVLO)
V CC(min)
Symbol
I Source
PSRR
PSRR
A VOL
I Sink
V OH
V OH
V OL
V OL
V FB
BW
V th
V th
I IB
A V
I IB
t r
t f
– 0.5
2.45
2.85
Min
0.7
2.0
5.0
0.9
7.8
9.0
7.0
65
60
13
12
15
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
UC284XB
– 0.1
– 2.0
–1.0
13.5
13.4
Typ
150
2.5
1.0
6.2
0.8
3.0
1.0
0.1
1.6
0.1
8.4
7.6
90
70
12
70
50
50
16
10
–
–
–
–
–
Max
2.55
–1.0
3.15
–10
300
150
150
1.1
1.1
0.4
2.2
1.1
9.0
8.2
17
11
–
–
–
–
–
–
–
–
–
–
–
–
–
–
– 0.5
2.42
2.85
2.85
0.85
12.9
14.5
Min
0.7
2.0
5.0
0.9
7.8
8.5
7.0
65
60
13
12
–
–
–
–
–
–
–
–
–
–
–
–
UC384XB, XBV
– 0.1
– 2.0
–1.0
13.5
13.4
Typ
150
2.5
1.0
6.2
0.8
0.8
3.0
3.0
1.0
1.0
0.1
1.6
1.6
0.1
8.4
7.6
90
70
12
70
50
50
16
10
–
– 2.0
Max
2.58
3.15
3.25
17.5
11.5
–10
300
150
150
1.1
1.2
1.1
1.1
0.4
2.2
2.3
1.1
9.0
8.2
–
–
–
–
–
–
–
–
–
–
MHz
Unit
V/V
mA
dB
dB
dB
ns
ns
ns
V
V
V
V
V
V
V
A
A
3