MIC3172YN Micrel Inc, MIC3172YN Datasheet - Page 5

• Manufacturer Part Number: MIC3172YN
• Description: IC REG SW 100KHZ 1.25A 8-DIP
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cukr

Specifications of MIC3172YN

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 1.25A
• Frequency - Switching: 100kHz
• Voltage - Input: 3 ~ 40 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 302mW
• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Current: 3A
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Supply Voltage Range: 3V To 40V
• Termination Type: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 576-2255; MIC3172YN

Typical Characteristics MIC2172 (cont)
Electrical Characteristics MIC3172
Note 1, 3. Unless otherwise specified, V
Micrel
Parameter
Oscillator Section
Frequency (f
Duty Cycle [δ(max)]
Sync Coupling Capacitor
Required for Frequency
Lock
Input Supply Voltage Section
Minimum Operating
Voltage
Quiescent Current (I
Supply Current Increase
(∆I
Parameter
Reference Section
Feedback Voltage (V
Feedback Voltage Line
Regulation
Feedback Bias Current
(I
Error Amplifier Section
Transconductance
(∆I
Voltage Gain
(∆V
Output Current
Output Swing
Compensation Pin
Threshold
Output Switch Section
ON Resistance
Current Limit
Breakdown Voltage (BV)
April 2006
FB
IN
COMP
)
COMP
)
/∆V
/∆V
FB
FB
O
)
)
)
Q
FB
)
)
Condition
V
V
3V ≤ V
∆I
Condition
Pin 2 tied to pin 3
3V ≤ V
∆I
0.9V ≤ V
V
High Clamp, V
Low Clamp, V
Duty Cycle = 0
I
Duty Cycle = 50%, T
Duty Cycle = 50%, T
Duty Cycle = 80%, Note 2
3V ≤ V
I
SW
SW
PP
PP
COMP
SW
COMP
= 1A, V
= 5mA
= 3.0V
= 40V
= 1A, V
= 1.5V
IN
IN
IN
= ±25µA
COMP
≤ 40V, V
≤ 40V
≤ 40V
FB
COMP
= 0.8V
≤ 1.4V
FB
FB
IN
= 1.5V
= 5V.
= 1V
COMP
= 1.5V
J
J
≥ 25°C
< 25°C
= 0.6V, I
SW
= 0
5
1.214
1.224
0.25
1.25
1.25
Min
Min
500
125
100
2.2
3.0
2.4
1.8
0.8
0.6
88
85
80
22
65
1
1.240
0.07
0.35
0.76
Typ
100
Typ
310
800
175
4.7
2.7
3.9
2.1
0.9
89
51
75
7
9
1.264
1.274
MIC2172/3172
1100
2000
Max
Max
0.52
1.08
1.25
112
115
120
750
350
400
3.0
6.0
7.0
2.3
1.1
3.5
2.5
[phone]
95
10
20
M9999-041806
9
1
3
µA/mV
µA/mV
Units
Units
%/V
kHz
kHz
V/V
mA
mA
nA
nA
µA
µA
pF
pF
%
Ω
Ω
V
V
V
V
V
V
V
A
A
A
V