| Customization: | Available |
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| Conductive Type: | Bipolar Integrated Circuit |
| Integration: | GSI |
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| Pin | Symbol | description |
| 1 | FB | Output voltage adjustment pin; connect a resistor with a precision of 1% or better to GND |
| 2,10,15, 18,19,20 |
NC | No connection required; leave floating |
| 3 | GND | Analog ground. Internally connected to PGND; no external connection to PGND is required. |
| 4,5,6 | SW | Switching output. Lay out large copper areas on pins 4, 5, and 6 to enhance heat dissipation |
| 7,8,9 | VOUT | Module voltage output pin; connect directly to the positive terminal of the load. An external output filter capacitor must be connected to PGND. |
| 11 | BST | Bootstrap pin. The module internally integrates a bootstrap capacitor; no external connection is required, leave floating. |
| 12,13,14 | PGND | Power ground. Reference ground for the module's input and output voltages. Special attention should be paid to PCB design. It is best to use copper pour and via designs. |
| 16 | VIN | Input voltage positive terminal. Provides power input to the internal power and control circuits. Operating voltage range is 4.5V to 18V. Low ESR and ESL capacitors should be used for decoupling and filtering, and the capacitors should be placed as close as possible to the module's VIN pin, using wide traces and multiple vias where possible. |
17 |
EN |
Enable pin. Connecting the pin to a high logic level enables the module, while grounding the pin disables the module output. The pin must not be left floating. |
| Product Model | Input | Output | Dimensions and Package | Packaging | |
| Input Range | Nominal Input | ||||
| UDM3610 | 4.5V~18V | -- | 0.6V~ | 5mm×3.2mm×2.2mm(LGA) | Packaged in a box |
| Absolute Maximum Ratings | Conditions | Minimum Value | Nominal Value | Maximum Value | Units |
| VIN, EN | -0.3 | 20 | V | ||
| vsw | -0.3 | 20 | V | ||
| VFB Pin Voltage | -0.3 | 6 | V | ||
| BST Pin Voltage | -0.3 | 23 | V | ||
| VOUT | -0.3 | 6 | V | ||
| Storage Temperature | -65 | +150 | ºC | ||
| Reflow Soldering Temperature | +245 | ºC | |||
| Electrical characteristics | Conditions | Minimum Value | Nominal Value | Maximum Value | Units |
| Input Voltage Range | 4.2 | 18 | V | ||
| Input Undervoltage Lockout threshold (Rising) | 4.0 | 4.3 | 4.5 | V | |
| Input Undervoltage Lockout Threshold (Falling) | 3.6 | 3.8 | 4.0 | V | |
| Minimum Start-Up Voltage | 4.5 | V | |||
| Quiescent current | VEN =2V, VFB =VREF x 105% | 350 | μA | ||
| Shutdown current | VIN=12V,VEN=0 | 5 | 10 | μA | |
| Switching Frequency | 1000 | KHz | |||
| Efficiency | VIN =5V ,VOUT =3.3V ,IOUT=1A | 84 | % | ||
| EN Threshold (Rising) | 1.0 | 1.1 | 1.2 | V | |
| EN Threshold (Falling) | 0.85 | 0.94 | 1.05 | V | |
| EN Input Current | VEN =2V | 2.3 | 2.5 | 2.7 | μA |
| Maximum Duty Cycle | 80 | % | |||
| Minimum On-Time | 80 | ns | |||
| Soft-Start Time | 0.8 | ms | |||
| FB voltage | 0.588 | 0.6 | 0.612 | V | |
| Line regulation | VOUT=3.3V ,5V < VIN< 18V ,ILOAD = 1.2A | ±0.5 | % | ||
| Load regulation | VIN=12V ,VOUT=3.3V,0A < ILOAD ≤ 1.2A | ±1.6 | % | ||
| Ripple and noise | VIN =12V ,VOUT =3.3V ,IOUT=1.2A, Cout=22uF, Bandwidth:20MHz2 | 30 | mV | ||
| Dynamic load response | 50-100% ILOAD ,di/dt=2A/μS Cout=22 uF | 480 |
mV |
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