Microchip Technology MIC2125, General Description Manual

Page: 4 / 34

MIC2125/6
DS20005459B-page 4

2015 Microchip Technology Inc.
TABLE 1-1: ELECTRICAL CHARACTERISTICS
Electrical Characteristics:
V
IN
= 12V, V
OUT
= 1.2V, V
BST
– V
SW
= 5V; T
A
= 25°C, unless noted.
Bold
values indicate
–40°C ≤ T
J
≤ +125°C.
( Note 1 )
.
Parameters Min. Typ. Max. Units Conditions
Power Supply Input
Input Voltage Range (V
IN
)
( Note 2 )
4.5
—
5.5
V V
DD
= V
IN
4.5
—
28
—
Quiescent Supply Current
(MIC2125) — 340
750
µA V
FB
= 1.5V
Quiescent Supply Current
(MIC2126) — 1.1
3
mA V
FB
= 1.5V
Shutdown Supply Current — 0.1
5
µA SW unconnected, V
EN
= 0V
V
DD
Supply
V
DD
Output Voltage
4.8
5.2
5.4
V V
IN
= 7V to 28V, I
DD
= 10 mA
V
DD
UVLO Threshold
3.7
4.2
4.5
V
DD
rising
V
DD
UVLO Hysteresis — 400 — mV —
Load Regulation 0.6 2 3.6 % I
DD
= 0 to 40 mA
Reference
Feedback Reference Voltage 0.597 0.6 0.603 V T
J
= 25°C (±0.5%)
0.594
0.6
0.606
–40°C ≤ T
J
≤ +125°C (±1%)
FB Bias Current — 0.01
0.5
µA V
FB
= 0.6V
Enable Control
EN Logic Level High
1.6
— — V —
EN Logic Level Low — —
0.6
—
EN Hysteresis — 120 — mV —
EN Bias Current — 6
30
µA V
EN
= 12V
Oscillator
Switching Frequency — 750 — kHz V
FREQ
= V
IN
— 375 — V
FREQ
= 50% x V
IN
Maximum Duty Cycle — 85 — % —
Minimum Duty Cycle — 0 — V
FB
> 0.6V
Minimum On-Time — 100 — ns —
Minimum Off-Time 150 220 300 —
Soft-Start
Soft-Start Time — 7 — ms —
Short-Circuit Protection and OVP
Current-Limit Comparator
Offset –15 –4 7 mV V
FB
= 0.6V
Current-Limit Source Current 32 36 40
µA
V
FB
= 0.6V
Note 1:
Specification for packaged product only.
2:
The application is fully functional at low V
DD
(supply of the control section) if the external MOSFETs have
low voltage V
TH
.