MIC38HC45-1BN Micrel Inc, MIC38HC45-1BN Datasheet - Page 5

• Manufacturer Part Number: MIC38HC45-1BN
• Description: IC CTRLR PWM CURRENT MODE 14-DIP
• Manufacturer: Micrel Inc

Specifications of MIC38HC45-1BN

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 7.6 V ~ 20 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-DIP (0.300", 7.62mm)
• Frequency-max: 500kHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MIC38HC42/3/4/5
Parameter
Current Sense
Gain
MaximumThreshold
PSRR
Input Bias Current
Delay to Output
Output
R
R
Rise Time
Fall Time
Undervoltage Lockout
Start Threshold
Minimum Operating Voltage
Pulse Width Modulator
Maximum Duty Cycle
Minimum Duty Cycle
Total Standby Current
Start-Up Current
Operating Supply Current
Zener Voltage (V
Note 1: These parameters, although guaranteed, are not 100% tested in production.
Note 2: Parameter measured at trip point of latch with V
Note 3: Gain defined as:
Note 4: Adjust V
Note 5: Output frequency equals oscillator frequency for the MIC38HC42 and MIC38HC43. Output frequency for the MIC38HC44, and
Note 6: On 8-pin version, 20V is maximum input on pin 7, as this is also the supply pin for the output stage. On 14-pin version, 40V is
April 2005
DS(ON)
DS(ON)
A =
‘HC’ High
‘HC’ Low
MIC38HC45 equals one half the oscillator frequency.
maximum for pin 12 and 20V maximum for pin 11.
V
TH
∆
V
DD
(I
PIN1
DD
SNS
)
above the start threshold before setting at 15V.
)
;
0
≤
V
TH
(I
SNS
Test Conditions
Notes 2, 3
V
12 ≤ V
I
I
T
T
MIC38HC42/4
MIC38HC43/5
MIC38HC42/4
MIC38HC43/5
MIC38HC42/3
MIC38HC44/5
V
V
V
I
SOURCE
SINK
DD
A
A
COMP
DD
DD
FB
= 25°C, C
= 25°C, C
)
= 25mA, Note 6
= V
= 13V, 38HC42/44
= 7.5V, 38HC43/45
= 200mA
≤
DD
= 5V, Note 2
ISNS
0.8V
= 200mA
≤ 18V, Note 2
= 0V
L
L
= 1nF
= 1nF
EA
= 0.
5
2.85
13.5
Min
0.9
7.8
7.0
94
46
30
8
–0.1
14.5
Typ
120
3.0
5.5
8.4
7.6
4.0
70
10
20
15
96
50
50
37
9
1
Max
3.15
15.5
250
200
1.1
9.0
8.2
6.0
–2
50
40
10
M9999-042205
0
Micrel, Inc.
Units
V/V
mA
dB
µA
µA
ns
ns
ns
Ω
Ω
%
%
%
V
V
V
V
V
V